Home / 390,923.20-586,440.69-124,686.73

Finding the Fourth Proportional to 390,923.20, 586,440.69 and 124,686.73

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Solution

The fourth proportional to 390,923.20, 586,440.69 and 124,686.73 is: 187,047.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,923.20 : 586,440.69 = 124,686.73 : x
  2. Step 2: Convert to fraction form
    390,923.20/586,440.69 = 124,686.73/x
  3. Step 3: Cross multiply
    390,923.20x = 586,440.69 × 124,686.73
  4. Step 4: Simplify right side
    390,923.20x = 73,121,371,975.04
  5. Step 5: Solve for x
    x = 73,121,371,975.04/390,923.20
  6. Step 6: Final answer
    x = 187,047.92

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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.