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Finding the Fourth Proportional to 389,065.54, 583,652.90 and 136,288.15

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Solution

The fourth proportional to 389,065.54, 583,652.90 and 136,288.15 is: 204,451.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,065.54 : 583,652.90 = 136,288.15 : x
  2. Step 2: Convert to fraction form
    389,065.54/583,652.90 = 136,288.15/x
  3. Step 3: Cross multiply
    389,065.54x = 583,652.90 × 136,288.15
  4. Step 4: Simplify right side
    389,065.54x = 79,544,973,983.14
  5. Step 5: Solve for x
    x = 79,544,973,983.14/389,065.54
  6. Step 6: Final answer
    x = 204,451.35

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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.