Home / 687,510.45-1,031,265.68-648,144.45

Finding the Fourth Proportional to 687,510.45, 1,031,265.68 and 648,144.45

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Solution

The fourth proportional to 687,510.45, 1,031,265.68 and 648,144.45 is: 972,216.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,510.45 : 1,031,265.68 = 648,144.45 : x
  2. Step 2: Convert to fraction form
    687,510.45/1,031,265.68 = 648,144.45/x
  3. Step 3: Cross multiply
    687,510.45x = 1,031,265.68 × 648,144.45
  4. Step 4: Simplify right side
    687,510.45x = 668,409,123,726.75
  5. Step 5: Solve for x
    x = 668,409,123,726.75/687,510.45
  6. Step 6: Final answer
    x = 972,216.68

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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.