Home / 260,342.20-390,513.30-155,279.80

Finding the Fourth Proportional to 260,342.20, 390,513.30 and 155,279.80

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Solution

The fourth proportional to 260,342.20, 390,513.30 and 155,279.80 is: 232,919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,342.20 : 390,513.30 = 155,279.80 : x
  2. Step 2: Convert to fraction form
    260,342.20/390,513.30 = 155,279.80/x
  3. Step 3: Cross multiply
    260,342.20x = 390,513.30 × 155,279.80
  4. Step 4: Simplify right side
    260,342.20x = 60,638,827,121.34
  5. Step 5: Solve for x
    x = 60,638,827,121.34/260,342.20
  6. Step 6: Final answer
    x = 232,919.70

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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.