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Finding the Fourth Proportional to 643,132.52, 887,549.22 and 388,433.96

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Solution

The fourth proportional to 643,132.52, 887,549.22 and 388,433.96 is: 536,054.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,132.52 : 887,549.22 = 388,433.96 : x
  2. Step 2: Convert to fraction form
    643,132.52/887,549.22 = 388,433.96/x
  3. Step 3: Cross multiply
    643,132.52x = 887,549.22 × 388,433.96
  4. Step 4: Simplify right side
    643,132.52x = 344,754,258,219.51
  5. Step 5: Solve for x
    x = 344,754,258,219.51/643,132.52
  6. Step 6: Final answer
    x = 536,054.77

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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.