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Finding the Fourth Proportional to 643,992.66, 888,665.27 and 357,490.13

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Solution

The fourth proportional to 643,992.66, 888,665.27 and 357,490.13 is: 493,311.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,992.66 : 888,665.27 = 357,490.13 : x
  2. Step 2: Convert to fraction form
    643,992.66/888,665.27 = 357,490.13/x
  3. Step 3: Cross multiply
    643,992.66x = 888,665.27 × 357,490.13
  4. Step 4: Simplify right side
    643,992.66x = 317,689,056,668.01
  5. Step 5: Solve for x
    x = 317,689,056,668.01/643,992.66
  6. Step 6: Final answer
    x = 493,311.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.