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Finding the Fourth Proportional to 485,610.30, 728,415.45 and 153,186.30

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Solution

The fourth proportional to 485,610.30, 728,415.45 and 153,186.30 is: 229,779.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,610.30 : 728,415.45 = 153,186.30 : x
  2. Step 2: Convert to fraction form
    485,610.30/728,415.45 = 153,186.30/x
  3. Step 3: Cross multiply
    485,610.30x = 728,415.45 × 153,186.30
  4. Step 4: Simplify right side
    485,610.30x = 111,583,267,648.34
  5. Step 5: Solve for x
    x = 111,583,267,648.34/485,610.30
  6. Step 6: Final answer
    x = 229,779.45

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Double scale
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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.