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Finding the Fourth Proportional to 643,328.80, 887,776.59 and 371,387.50

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Solution

The fourth proportional to 643,328.80, 887,776.59 and 371,387.50 is: 512,504.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,328.80 : 887,776.59 = 371,387.50 : x
  2. Step 2: Convert to fraction form
    643,328.80/887,776.59 = 371,387.50/x
  3. Step 3: Cross multiply
    643,328.80x = 887,776.59 × 371,387.50
  4. Step 4: Simplify right side
    643,328.80x = 329,709,128,318.63
  5. Step 5: Solve for x
    x = 329,709,128,318.63/643,328.80
  6. Step 6: Final answer
    x = 512,504.85

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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.