Home / 687,751.80-1,031,627.70-628,654.20

Finding the Fourth Proportional to 687,751.80, 1,031,627.70 and 628,654.20

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Solution

The fourth proportional to 687,751.80, 1,031,627.70 and 628,654.20 is: 942,981.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,751.80 : 1,031,627.70 = 628,654.20 : x
  2. Step 2: Convert to fraction form
    687,751.80/1,031,627.70 = 628,654.20/x
  3. Step 3: Cross multiply
    687,751.80x = 1,031,627.70 × 628,654.20
  4. Step 4: Simplify right side
    687,751.80x = 648,537,086,441.34
  5. Step 5: Solve for x
    x = 648,537,086,441.34/687,751.80
  6. Step 6: Final answer
    x = 942,981.30

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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.