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Finding the Fourth Proportional to 278,422.78, 384,223.68 and 151,098.40

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Solution

The fourth proportional to 278,422.78, 384,223.68 and 151,098.40 is: 208,515.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,422.78 : 384,223.68 = 151,098.40 : x
  2. Step 2: Convert to fraction form
    278,422.78/384,223.68 = 151,098.40/x
  3. Step 3: Cross multiply
    278,422.78x = 384,223.68 × 151,098.40
  4. Step 4: Simplify right side
    278,422.78x = 58,055,583,290.11
  5. Step 5: Solve for x
    x = 58,055,583,290.11/278,422.78
  6. Step 6: Final answer
    x = 208,515.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.