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Finding the Fourth Proportional to 485,434.86, 728,151.64 and 130,448.90

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Solution

The fourth proportional to 485,434.86, 728,151.64 and 130,448.90 is: 195,673.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,434.86 : 728,151.64 = 130,448.90 : x
  2. Step 2: Convert to fraction form
    485,434.86/728,151.64 = 130,448.90/x
  3. Step 3: Cross multiply
    485,434.86x = 728,151.64 × 130,448.90
  4. Step 4: Simplify right side
    485,434.86x = 94,986,580,471.20
  5. Step 5: Solve for x
    x = 94,986,580,471.20/485,434.86
  6. Step 6: Final answer
    x = 195,673.18

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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.