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Finding the Fourth Proportional to 717,374.16, 990,001.71 and 395,108.79

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Solution

The fourth proportional to 717,374.16, 990,001.71 and 395,108.79 is: 545,264.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,374.16 : 990,001.71 = 395,108.79 : x
  2. Step 2: Convert to fraction form
    717,374.16/990,001.71 = 395,108.79/x
  3. Step 3: Cross multiply
    717,374.16x = 990,001.71 × 395,108.79
  4. Step 4: Simplify right side
    717,374.16x = 391,158,377,736.03
  5. Step 5: Solve for x
    x = 391,158,377,736.03/717,374.16
  6. Step 6: Final answer
    x = 545,264.10

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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.