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Finding the Fourth Proportional to 668,449.80, 1,002,674.70 and 402,073.20

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Solution

The fourth proportional to 668,449.80, 1,002,674.70 and 402,073.20 is: 603,109.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,449.80 : 1,002,674.70 = 402,073.20 : x
  2. Step 2: Convert to fraction form
    668,449.80/1,002,674.70 = 402,073.20/x
  3. Step 3: Cross multiply
    668,449.80x = 1,002,674.70 × 402,073.20
  4. Step 4: Simplify right side
    668,449.80x = 403,148,625,188.04
  5. Step 5: Solve for x
    x = 403,148,625,188.04/668,449.80
  6. Step 6: Final answer
    x = 603,109.80

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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.