Home / 278,360.40-417,670.20-145,390.80

Finding the Fourth Proportional to 278,360.40, 417,670.20 and 145,390.80

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Solution

The fourth proportional to 278,360.40, 417,670.20 and 145,390.80 is: 218,153.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,360.40 : 417,670.20 = 145,390.80 : x
  2. Step 2: Convert to fraction form
    278,360.40/417,670.20 = 145,390.80/x
  3. Step 3: Cross multiply
    278,360.40x = 417,670.20 × 145,390.80
  4. Step 4: Simplify right side
    278,360.40x = 60,725,404,514.16
  5. Step 5: Solve for x
    x = 60,725,404,514.16/278,360.40
  6. Step 6: Final answer
    x = 218,153.89

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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.