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Finding the Fourth Proportional to 485,643.59, 728,050.02 and 186,338.97

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Solution

The fourth proportional to 485,643.59, 728,050.02 and 186,338.97 is: 279,349.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,643.59 : 728,050.02 = 186,338.97 : x
  2. Step 2: Convert to fraction form
    485,643.59/728,050.02 = 186,338.97/x
  3. Step 3: Cross multiply
    485,643.59x = 728,050.02 × 186,338.97
  4. Step 4: Simplify right side
    485,643.59x = 135,664,090,835.28
  5. Step 5: Solve for x
    x = 135,664,090,835.28/485,643.59
  6. Step 6: Final answer
    x = 279,349.08

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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.