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Finding the Fourth Proportional to 485,898.40, 728,847.60 and 170,387.20

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Solution

The fourth proportional to 485,898.40, 728,847.60 and 170,387.20 is: 255,580.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,898.40 : 728,847.60 = 170,387.20 : x
  2. Step 2: Convert to fraction form
    485,898.40/728,847.60 = 170,387.20/x
  3. Step 3: Cross multiply
    485,898.40x = 728,847.60 × 170,387.20
  4. Step 4: Simplify right side
    485,898.40x = 124,186,301,790.72
  5. Step 5: Solve for x
    x = 124,186,301,790.72/485,898.40
  6. Step 6: Final answer
    x = 255,580.80

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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.