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Finding the Fourth Proportional to 579,384.20, 869,076.30 and 411,422.60

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Solution

The fourth proportional to 579,384.20, 869,076.30 and 411,422.60 is: 617,133.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,384.20 : 869,076.30 = 411,422.60 : x
  2. Step 2: Convert to fraction form
    579,384.20/869,076.30 = 411,422.60/x
  3. Step 3: Cross multiply
    579,384.20x = 869,076.30 × 411,422.60
  4. Step 4: Simplify right side
    579,384.20x = 357,557,630,944.38
  5. Step 5: Solve for x
    x = 357,557,630,944.38/579,384.20
  6. Step 6: Final answer
    x = 617,133.90

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Double scale
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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.