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Finding the Fourth Proportional to 724,672.40, 1,000,028.67 and 402,374.21

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Solution

The fourth proportional to 724,672.40, 1,000,028.67 and 402,374.21 is: 555,265.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,672.40 : 1,000,028.67 = 402,374.21 : x
  2. Step 2: Convert to fraction form
    724,672.40/1,000,028.67 = 402,374.21/x
  3. Step 3: Cross multiply
    724,672.40x = 1,000,028.67 × 402,374.21
  4. Step 4: Simplify right side
    724,672.40x = 402,385,741,068.46
  5. Step 5: Solve for x
    x = 402,385,741,068.46/724,672.40
  6. Step 6: Final answer
    x = 555,265.72

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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.