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Finding the Fourth Proportional to 717,419.52, 990,038.88 and 395,126.88

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Solution

The fourth proportional to 717,419.52, 990,038.88 and 395,126.88 is: 545,275.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,419.52 : 990,038.88 = 395,126.88 : x
  2. Step 2: Convert to fraction form
    717,419.52/990,038.88 = 395,126.88/x
  3. Step 3: Cross multiply
    717,419.52x = 990,038.88 × 395,126.88
  4. Step 4: Simplify right side
    717,419.52x = 391,190,973,733.09
  5. Step 5: Solve for x
    x = 391,190,973,733.09/717,419.52
  6. Step 6: Final answer
    x = 545,275.06

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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.