Home / 687,637.80-1,031,456.70-628,540.20

Finding the Fourth Proportional to 687,637.80, 1,031,456.70 and 628,540.20

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Solution

The fourth proportional to 687,637.80, 1,031,456.70 and 628,540.20 is: 942,810.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,637.80 : 1,031,456.70 = 628,540.20 : x
  2. Step 2: Convert to fraction form
    687,637.80/1,031,456.70 = 628,540.20/x
  3. Step 3: Cross multiply
    687,637.80x = 1,031,456.70 × 628,540.20
  4. Step 4: Simplify right side
    687,637.80x = 648,312,000,509.34
  5. Step 5: Solve for x
    x = 648,312,000,509.34/687,637.80
  6. Step 6: Final answer
    x = 942,810.30

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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.