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Finding the Fourth Proportional to 718,692.42, 991,800.24 and 396,411.24

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Solution

The fourth proportional to 718,692.42, 991,800.24 and 396,411.24 is: 547,050.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,692.42 : 991,800.24 = 396,411.24 : x
  2. Step 2: Convert to fraction form
    718,692.42/991,800.24 = 396,411.24/x
  3. Step 3: Cross multiply
    718,692.42x = 991,800.24 × 396,411.24
  4. Step 4: Simplify right side
    718,692.42x = 393,160,762,970.70
  5. Step 5: Solve for x
    x = 393,160,762,970.70/718,692.42
  6. Step 6: Final answer
    x = 547,050.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.