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Finding the Fourth Proportional to 485,389.62, 728,035.21 and 130,357.51

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Solution

The fourth proportional to 485,389.62, 728,035.21 and 130,357.51 is: 195,523.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,389.62 : 728,035.21 = 130,357.51 : x
  2. Step 2: Convert to fraction form
    485,389.62/728,035.21 = 130,357.51/x
  3. Step 3: Cross multiply
    485,389.62x = 728,035.21 × 130,357.51
  4. Step 4: Simplify right side
    485,389.62x = 94,904,857,167.93
  5. Step 5: Solve for x
    x = 94,904,857,167.93/485,389.62
  6. Step 6: Final answer
    x = 195,523.05

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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.