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Finding the Fourth Proportional to 717,669.12, 990,336 and 431,018.88

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Solution

The fourth proportional to 717,669.12, 990,336 and 431,018.88 is: 594,777.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,669.12 : 990,336 = 431,018.88 : x
  2. Step 2: Convert to fraction form
    717,669.12/990,336 = 431,018.88/x
  3. Step 3: Cross multiply
    717,669.12x = 990,336 × 431,018.88
  4. Step 4: Simplify right side
    717,669.12x = 426,853,513,543.68
  5. Step 5: Solve for x
    x = 426,853,513,543.68/717,669.12
  6. Step 6: Final answer
    x = 594,777.60

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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.