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Finding the Fourth Proportional to 643,074.88, 887,488.80 and 356,622.40

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Solution

The fourth proportional to 643,074.88, 887,488.80 and 356,622.40 is: 492,164.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,074.88 : 887,488.80 = 356,622.40 : x
  2. Step 2: Convert to fraction form
    643,074.88/887,488.80 = 356,622.40/x
  3. Step 3: Cross multiply
    643,074.88x = 887,488.80 × 356,622.40
  4. Step 4: Simplify right side
    643,074.88x = 316,498,385,829.12
  5. Step 5: Solve for x
    x = 316,498,385,829.12/643,074.88
  6. Step 6: Final answer
    x = 492,164.13

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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.