Home / 687,600.80-1,031,401.20-648,234.80

Finding the Fourth Proportional to 687,600.80, 1,031,401.20 and 648,234.80

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Solution

The fourth proportional to 687,600.80, 1,031,401.20 and 648,234.80 is: 972,352.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,600.80 : 1,031,401.20 = 648,234.80 : x
  2. Step 2: Convert to fraction form
    687,600.80/1,031,401.20 = 648,234.80/x
  3. Step 3: Cross multiply
    687,600.80x = 1,031,401.20 × 648,234.80
  4. Step 4: Simplify right side
    687,600.80x = 668,590,150,601.76
  5. Step 5: Solve for x
    x = 668,590,150,601.76/687,600.80
  6. Step 6: Final answer
    x = 972,352.20

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Double scale
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Similar ratio
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1.5x scale

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.