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Finding the Fourth Proportional to 643,008.58, 887,391.05 and 356,528.59

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Solution

The fourth proportional to 643,008.58, 887,391.05 and 356,528.59 is: 492,031.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,008.58 : 887,391.05 = 356,528.59 : x
  2. Step 2: Convert to fraction form
    643,008.58/887,391.05 = 356,528.59/x
  3. Step 3: Cross multiply
    643,008.58x = 887,391.05 × 356,528.59
  4. Step 4: Simplify right side
    643,008.58x = 316,380,275,834.00
  5. Step 5: Solve for x
    x = 316,380,275,834.00/643,008.58
  6. Step 6: Final answer
    x = 492,031.19

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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.