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Finding the Fourth Proportional to 579,384.30, 869,076.45 and 491,904.30

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Solution

The fourth proportional to 579,384.30, 869,076.45 and 491,904.30 is: 737,856.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,384.30 : 869,076.45 = 491,904.30 : x
  2. Step 2: Convert to fraction form
    579,384.30/869,076.45 = 491,904.30/x
  3. Step 3: Cross multiply
    579,384.30x = 869,076.45 × 491,904.30
  4. Step 4: Simplify right side
    579,384.30x = 427,502,442,783.74
  5. Step 5: Solve for x
    x = 427,502,442,783.74/579,384.30
  6. Step 6: Final answer
    x = 737,856.45

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Half scale
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Double scale
Find fourth proportional to 579,385.30, 869,077.95 and 491,905.30
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.