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Finding the Fourth Proportional to 485,430.60, 728,145.26 and 130,444.64

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Solution

The fourth proportional to 485,430.60, 728,145.26 and 130,444.64 is: 195,666.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,430.60 : 728,145.26 = 130,444.64 : x
  2. Step 2: Convert to fraction form
    485,430.60/728,145.26 = 130,444.64/x
  3. Step 3: Cross multiply
    485,430.60x = 728,145.26 × 130,444.64
  4. Step 4: Simplify right side
    485,430.60x = 94,982,650,064.74
  5. Step 5: Solve for x
    x = 94,982,650,064.74/485,430.60
  6. Step 6: Final answer
    x = 195,666.79

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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.