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Finding the Fourth Proportional to 389,139.24, 583,710.48 and 108,655.68

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Solution

The fourth proportional to 389,139.24, 583,710.48 and 108,655.68 is: 162,983.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,139.24 : 583,710.48 = 108,655.68 : x
  2. Step 2: Convert to fraction form
    389,139.24/583,710.48 = 108,655.68/x
  3. Step 3: Cross multiply
    389,139.24x = 583,710.48 × 108,655.68
  4. Step 4: Simplify right side
    389,139.24x = 63,423,459,127.53
  5. Step 5: Solve for x
    x = 63,423,459,127.53/389,139.24
  6. Step 6: Final answer
    x = 162,983.97

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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.