Home / 486,145.20-728,598.15-272,912.70

Finding the Fourth Proportional to 486,145.20, 728,598.15 and 272,912.70

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Solution

The fourth proportional to 486,145.20, 728,598.15 and 272,912.70 is: 409,021.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,145.20 : 728,598.15 = 272,912.70 : x
  2. Step 2: Convert to fraction form
    486,145.20/728,598.15 = 272,912.70/x
  3. Step 3: Cross multiply
    486,145.20x = 728,598.15 × 272,912.70
  4. Step 4: Simplify right side
    486,145.20x = 198,843,688,331.51
  5. Step 5: Solve for x
    x = 198,843,688,331.51/486,145.20
  6. Step 6: Final answer
    x = 409,021.19

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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.