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Finding the Fourth Proportional to 260,182.40, 390,079.20 and 141,987.20

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Solution

The fourth proportional to 260,182.40, 390,079.20 and 141,987.20 is: 212,874.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,182.40 : 390,079.20 = 141,987.20 : x
  2. Step 2: Convert to fraction form
    260,182.40/390,079.20 = 141,987.20/x
  3. Step 3: Cross multiply
    260,182.40x = 390,079.20 × 141,987.20
  4. Step 4: Simplify right side
    260,182.40x = 55,386,253,386.24
  5. Step 5: Solve for x
    x = 55,386,253,386.24/260,182.40
  6. Step 6: Final answer
    x = 212,874.71

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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.