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Finding the Fourth Proportional to 265,417.20, 398,125.80 and 75,877.20

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Solution

The fourth proportional to 265,417.20, 398,125.80 and 75,877.20 is: 113,815.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,417.20 : 398,125.80 = 75,877.20 : x
  2. Step 2: Convert to fraction form
    265,417.20/398,125.80 = 75,877.20/x
  3. Step 3: Cross multiply
    265,417.20x = 398,125.80 × 75,877.20
  4. Step 4: Simplify right side
    265,417.20x = 30,208,670,951.76
  5. Step 5: Solve for x
    x = 30,208,670,951.76/265,417.20
  6. Step 6: Final answer
    x = 113,815.80

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1.5x scale

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.