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Finding the Fourth Proportional to 579,318.30, 868,977.45 and 491,838.30

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Solution

The fourth proportional to 579,318.30, 868,977.45 and 491,838.30 is: 737,757.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,318.30 : 868,977.45 = 491,838.30 : x
  2. Step 2: Convert to fraction form
    579,318.30/868,977.45 = 491,838.30/x
  3. Step 3: Cross multiply
    579,318.30x = 868,977.45 × 491,838.30
  4. Step 4: Simplify right side
    579,318.30x = 427,396,391,746.34
  5. Step 5: Solve for x
    x = 427,396,391,746.34/579,318.30
  6. Step 6: Final answer
    x = 737,757.45

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Half scale
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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.