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Finding the Fourth Proportional to 485,376.68, 728,392.80 and 169,836.32

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Solution

The fourth proportional to 485,376.68, 728,392.80 and 169,836.32 is: 254,869.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,376.68 : 728,392.80 = 169,836.32 : x
  2. Step 2: Convert to fraction form
    485,376.68/728,392.80 = 169,836.32/x
  3. Step 3: Cross multiply
    485,376.68x = 728,392.80 × 169,836.32
  4. Step 4: Simplify right side
    485,376.68x = 123,707,552,666.50
  5. Step 5: Solve for x
    x = 123,707,552,666.50/485,376.68
  6. Step 6: Final answer
    x = 254,869.17

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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.