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Finding the Fourth Proportional to 485,915.82, 728,878.62 and 170,380.32

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Solution

The fourth proportional to 485,915.82, 728,878.62 and 170,380.32 is: 255,572.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,915.82 : 728,878.62 = 170,380.32 : x
  2. Step 2: Convert to fraction form
    485,915.82/728,878.62 = 170,380.32/x
  3. Step 3: Cross multiply
    485,915.82x = 728,878.62 × 170,380.32
  4. Step 4: Simplify right side
    485,915.82x = 124,186,572,516.76
  5. Step 5: Solve for x
    x = 124,186,572,516.76/485,915.82
  6. Step 6: Final answer
    x = 255,572.19

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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.