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Finding the Fourth Proportional to 717,955.49, 990,778.59 and 395,665.59

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Solution

The fourth proportional to 717,955.49, 990,778.59 and 395,665.59 is: 546,018.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,955.49 : 990,778.59 = 395,665.59 : x
  2. Step 2: Convert to fraction form
    717,955.49/990,778.59 = 395,665.59/x
  3. Step 3: Cross multiply
    717,955.49x = 990,778.59 × 395,665.59
  4. Step 4: Simplify right side
    717,955.49x = 392,016,988,934.08
  5. Step 5: Solve for x
    x = 392,016,988,934.08/717,955.49
  6. Step 6: Final answer
    x = 546,018.51

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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.