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Finding the Fourth Proportional to 485,839.36, 728,676.42 and 130,774.24

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Solution

The fourth proportional to 485,839.36, 728,676.42 and 130,774.24 is: 196,139.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,839.36 : 728,676.42 = 130,774.24 : x
  2. Step 2: Convert to fraction form
    485,839.36/728,676.42 = 130,774.24/x
  3. Step 3: Cross multiply
    485,839.36x = 728,676.42 × 130,774.24
  4. Step 4: Simplify right side
    485,839.36x = 95,292,105,031.42
  5. Step 5: Solve for x
    x = 95,292,105,031.42/485,839.36
  6. Step 6: Final answer
    x = 196,139.12

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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.