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Finding the Fourth Proportional to 643,283.82, 887,655.51 and 356,733.90

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Solution

The fourth proportional to 643,283.82, 887,655.51 and 356,733.90 is: 492,250.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,283.82 : 887,655.51 = 356,733.90 : x
  2. Step 2: Convert to fraction form
    643,283.82/887,655.51 = 356,733.90/x
  3. Step 3: Cross multiply
    643,283.82x = 887,655.51 × 356,733.90
  4. Step 4: Simplify right side
    643,283.82x = 316,656,811,938.79
  5. Step 5: Solve for x
    x = 316,656,811,938.79/643,283.82
  6. Step 6: Final answer
    x = 492,250.55

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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.