Home / 687,618.30-1,031,427.45-628,520.70

Finding the Fourth Proportional to 687,618.30, 1,031,427.45 and 628,520.70

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Solution

The fourth proportional to 687,618.30, 1,031,427.45 and 628,520.70 is: 942,781.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,618.30 : 1,031,427.45 = 628,520.70 : x
  2. Step 2: Convert to fraction form
    687,618.30/1,031,427.45 = 628,520.70/x
  3. Step 3: Cross multiply
    687,618.30x = 1,031,427.45 × 628,520.70
  4. Step 4: Simplify right side
    687,618.30x = 648,273,502,873.22
  5. Step 5: Solve for x
    x = 648,273,502,873.22/687,618.30
  6. Step 6: Final answer
    x = 942,781.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.