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Finding the Fourth Proportional to 402,385.40, 603,578.10 and 236,497.40

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Solution

The fourth proportional to 402,385.40, 603,578.10 and 236,497.40 is: 354,746.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,385.40 : 603,578.10 = 236,497.40 : x
  2. Step 2: Convert to fraction form
    402,385.40/603,578.10 = 236,497.40/x
  3. Step 3: Cross multiply
    402,385.40x = 603,578.10 × 236,497.40
  4. Step 4: Simplify right side
    402,385.40x = 142,744,651,346.94
  5. Step 5: Solve for x
    x = 142,744,651,346.94/402,385.40
  6. Step 6: Final answer
    x = 354,746.10

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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.