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Finding the Fourth Proportional to 643,648.68, 888,244.92 and 357,187.32

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Solution

The fourth proportional to 643,648.68, 888,244.92 and 357,187.32 is: 492,923.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,648.68 : 888,244.92 = 357,187.32 : x
  2. Step 2: Convert to fraction form
    643,648.68/888,244.92 = 357,187.32/x
  3. Step 3: Cross multiply
    643,648.68x = 888,244.92 × 357,187.32
  4. Step 4: Simplify right side
    643,648.68x = 317,269,822,478.41
  5. Step 5: Solve for x
    x = 317,269,822,478.41/643,648.68
  6. Step 6: Final answer
    x = 492,923.91

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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.