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Finding the Fourth Proportional to 634,434.80, 875,061 and 538,790

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Solution

The fourth proportional to 634,434.80, 875,061 and 538,790 is: 743,140.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,434.80 : 875,061 = 538,790 : x
  2. Step 2: Convert to fraction form
    634,434.80/875,061 = 538,790/x
  3. Step 3: Cross multiply
    634,434.80x = 875,061 × 538,790
  4. Step 4: Simplify right side
    634,434.80x = 471,474,116,190
  5. Step 5: Solve for x
    x = 471,474,116,190/634,434.80
  6. Step 6: Final answer
    x = 743,140.38

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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.