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Finding the Fourth Proportional to 715,446.98, 987,101.52 and 428,862.50

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Solution

The fourth proportional to 715,446.98, 987,101.52 and 428,862.50 is: 591,701.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,446.98 : 987,101.52 = 428,862.50 : x
  2. Step 2: Convert to fraction form
    715,446.98/987,101.52 = 428,862.50/x
  3. Step 3: Cross multiply
    715,446.98x = 987,101.52 × 428,862.50
  4. Step 4: Simplify right side
    715,446.98x = 423,330,820,685.49
  5. Step 5: Solve for x
    x = 423,330,820,685.49/715,446.98
  6. Step 6: Final answer
    x = 591,701.18

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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.