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Finding the Fourth Proportional to 485,705.04, 728,116.52 and 169,989.72

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Solution

The fourth proportional to 485,705.04, 728,116.52 and 169,989.72 is: 254,830.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,705.04 : 728,116.52 = 169,989.72 : x
  2. Step 2: Convert to fraction form
    485,705.04/728,116.52 = 169,989.72/x
  3. Step 3: Cross multiply
    485,705.04x = 728,116.52 × 169,989.72
  4. Step 4: Simplify right side
    485,705.04x = 123,772,323,362.17
  5. Step 5: Solve for x
    x = 123,772,323,362.17/485,705.04
  6. Step 6: Final answer
    x = 254,830.22

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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.