Home / 389,629.40-584,444.10-140,221.40

Finding the Fourth Proportional to 389,629.40, 584,444.10 and 140,221.40

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Solution

The fourth proportional to 389,629.40, 584,444.10 and 140,221.40 is: 210,332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,629.40 : 584,444.10 = 140,221.40 : x
  2. Step 2: Convert to fraction form
    389,629.40/584,444.10 = 140,221.40/x
  3. Step 3: Cross multiply
    389,629.40x = 584,444.10 × 140,221.40
  4. Step 4: Simplify right side
    389,629.40x = 81,951,569,923.74
  5. Step 5: Solve for x
    x = 81,951,569,923.74/389,629.40
  6. Step 6: Final answer
    x = 210,332.10

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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.