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Finding the Fourth Proportional to 717,607.51, 990,354.20 and 395,375.54

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Solution

The fourth proportional to 717,607.51, 990,354.20 and 395,375.54 is: 545,649.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,607.51 : 990,354.20 = 395,375.54 : x
  2. Step 2: Convert to fraction form
    717,607.51/990,354.20 = 395,375.54/x
  3. Step 3: Cross multiply
    717,607.51x = 990,354.20 × 395,375.54
  4. Step 4: Simplify right side
    717,607.51x = 391,561,819,687.62
  5. Step 5: Solve for x
    x = 391,561,819,687.62/717,607.51
  6. Step 6: Final answer
    x = 545,649.00

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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.