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Finding the Fourth Proportional to 260,325.66, 390,042.72 and 142,079.97

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Solution

The fourth proportional to 260,325.66, 390,042.72 and 142,079.97 is: 212,876.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,325.66 : 390,042.72 = 142,079.97 : x
  2. Step 2: Convert to fraction form
    260,325.66/390,042.72 = 142,079.97/x
  3. Step 3: Cross multiply
    260,325.66x = 390,042.72 × 142,079.97
  4. Step 4: Simplify right side
    260,325.66x = 55,417,257,956.32
  5. Step 5: Solve for x
    x = 55,417,257,956.32/260,325.66
  6. Step 6: Final answer
    x = 212,876.66

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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.