Home / 278,318.60-417,575.10-100,831.40

Finding the Fourth Proportional to 278,318.60, 417,575.10 and 100,831.40

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Solution

The fourth proportional to 278,318.60, 417,575.10 and 100,831.40 is: 151,282.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,318.60 : 417,575.10 = 100,831.40 : x
  2. Step 2: Convert to fraction form
    278,318.60/417,575.10 = 100,831.40/x
  3. Step 3: Cross multiply
    278,318.60x = 417,575.10 × 100,831.40
  4. Step 4: Simplify right side
    278,318.60x = 42,104,681,938.14
  5. Step 5: Solve for x
    x = 42,104,681,938.14/278,318.60
  6. Step 6: Final answer
    x = 151,282.31

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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.