Home / 687,618.80-1,031,428.20-628,521.20

Finding the Fourth Proportional to 687,618.80, 1,031,428.20 and 628,521.20

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Solution

The fourth proportional to 687,618.80, 1,031,428.20 and 628,521.20 is: 942,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,618.80 : 1,031,428.20 = 628,521.20 : x
  2. Step 2: Convert to fraction form
    687,618.80/1,031,428.20 = 628,521.20/x
  3. Step 3: Cross multiply
    687,618.80x = 1,031,428.20 × 628,521.20
  4. Step 4: Simplify right side
    687,618.80x = 648,274,489,977.84
  5. Step 5: Solve for x
    x = 648,274,489,977.84/687,618.80
  6. Step 6: Final answer
    x = 942,781.80

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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.