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Finding the Fourth Proportional to 485,721.20, 728,047.20 and 170,015.60

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Solution

The fourth proportional to 485,721.20, 728,047.20 and 170,015.60 is: 254,836.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,721.20 : 728,047.20 = 170,015.60 : x
  2. Step 2: Convert to fraction form
    485,721.20/728,047.20 = 170,015.60/x
  3. Step 3: Cross multiply
    485,721.20x = 728,047.20 × 170,015.60
  4. Step 4: Simplify right side
    485,721.20x = 123,779,381,536.32
  5. Step 5: Solve for x
    x = 123,779,381,536.32/485,721.20
  6. Step 6: Final answer
    x = 254,836.28

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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.