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Finding the Fourth Proportional to 260,414.80, 390,881.40 and 127,445.20

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Solution

The fourth proportional to 260,414.80, 390,881.40 and 127,445.20 is: 191,294.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,414.80 : 390,881.40 = 127,445.20 : x
  2. Step 2: Convert to fraction form
    260,414.80/390,881.40 = 127,445.20/x
  3. Step 3: Cross multiply
    260,414.80x = 390,881.40 × 127,445.20
  4. Step 4: Simplify right side
    260,414.80x = 49,815,958,199.28
  5. Step 5: Solve for x
    x = 49,815,958,199.28/260,414.80
  6. Step 6: Final answer
    x = 191,294.65

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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.