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Finding the Fourth Proportional to 485,743.40, 728,615.10 and 464,748.20

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Solution

The fourth proportional to 485,743.40, 728,615.10 and 464,748.20 is: 697,122.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,743.40 : 728,615.10 = 464,748.20 : x
  2. Step 2: Convert to fraction form
    485,743.40/728,615.10 = 464,748.20/x
  3. Step 3: Cross multiply
    485,743.40x = 728,615.10 × 464,748.20
  4. Step 4: Simplify right side
    485,743.40x = 338,622,556,217.82
  5. Step 5: Solve for x
    x = 338,622,556,217.82/485,743.40
  6. Step 6: Final answer
    x = 697,122.30

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Similar ratio
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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.