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Finding the Fourth Proportional to 717,543.16, 990,204.96 and 395,245.78

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Solution

The fourth proportional to 717,543.16, 990,204.96 and 395,245.78 is: 545,436.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,543.16 : 990,204.96 = 395,245.78 : x
  2. Step 2: Convert to fraction form
    717,543.16/990,204.96 = 395,245.78/x
  3. Step 3: Cross multiply
    717,543.16x = 990,204.96 × 395,245.78
  4. Step 4: Simplify right side
    717,543.16x = 391,374,331,775.07
  5. Step 5: Solve for x
    x = 391,374,331,775.07/717,543.16
  6. Step 6: Final answer
    x = 545,436.64

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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.