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Finding the Fourth Proportional to 724,690.92, 1,000,040.04 and 402,421.44

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Solution

The fourth proportional to 724,690.92, 1,000,040.04 and 402,421.44 is: 555,323.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,690.92 : 1,000,040.04 = 402,421.44 : x
  2. Step 2: Convert to fraction form
    724,690.92/1,000,040.04 = 402,421.44/x
  3. Step 3: Cross multiply
    724,690.92x = 1,000,040.04 × 402,421.44
  4. Step 4: Simplify right side
    724,690.92x = 402,437,552,954.46
  5. Step 5: Solve for x
    x = 402,437,552,954.46/724,690.92
  6. Step 6: Final answer
    x = 555,323.02

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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.