Home / 386,288.80-579,433.20-136,938.40

Finding the Fourth Proportional to 386,288.80, 579,433.20 and 136,938.40

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Solution

The fourth proportional to 386,288.80, 579,433.20 and 136,938.40 is: 205,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,288.80 : 579,433.20 = 136,938.40 : x
  2. Step 2: Convert to fraction form
    386,288.80/579,433.20 = 136,938.40/x
  3. Step 3: Cross multiply
    386,288.80x = 579,433.20 × 136,938.40
  4. Step 4: Simplify right side
    386,288.80x = 79,346,655,314.88
  5. Step 5: Solve for x
    x = 79,346,655,314.88/386,288.80
  6. Step 6: Final answer
    x = 205,407.60

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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.