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Finding the Fourth Proportional to 389,338.76, 584,008.68 and 108,855.74

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Solution

The fourth proportional to 389,338.76, 584,008.68 and 108,855.74 is: 163,283.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,338.76 : 584,008.68 = 108,855.74 : x
  2. Step 2: Convert to fraction form
    389,338.76/584,008.68 = 108,855.74/x
  3. Step 3: Cross multiply
    389,338.76x = 584,008.68 × 108,855.74
  4. Step 4: Simplify right side
    389,338.76x = 63,572,697,027.82
  5. Step 5: Solve for x
    x = 63,572,697,027.82/389,338.76
  6. Step 6: Final answer
    x = 163,283.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.