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Finding the Fourth Proportional to 717,934.74, 990,756.48 and 395,656.32

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Solution

The fourth proportional to 717,934.74, 990,756.48 and 395,656.32 is: 546,009.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,934.74 : 990,756.48 = 395,656.32 : x
  2. Step 2: Convert to fraction form
    717,934.74/990,756.48 = 395,656.32/x
  3. Step 3: Cross multiply
    717,934.74x = 990,756.48 × 395,656.32
  4. Step 4: Simplify right side
    717,934.74x = 391,999,062,892.95
  5. Step 5: Solve for x
    x = 391,999,062,892.95/717,934.74
  6. Step 6: Final answer
    x = 546,009.33

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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.