Home / 486,021.30-729,031.95-432,877.20

Finding the Fourth Proportional to 486,021.30, 729,031.95 and 432,877.20

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Solution

The fourth proportional to 486,021.30, 729,031.95 and 432,877.20 is: 649,315.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,021.30 : 729,031.95 = 432,877.20 : x
  2. Step 2: Convert to fraction form
    486,021.30/729,031.95 = 432,877.20/x
  3. Step 3: Cross multiply
    486,021.30x = 729,031.95 × 432,877.20
  4. Step 4: Simplify right side
    486,021.30x = 315,581,309,226.54
  5. Step 5: Solve for x
    x = 315,581,309,226.54/486,021.30
  6. Step 6: Final answer
    x = 649,315.80

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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.