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Finding the Fourth Proportional to 485,816.20, 728,594.70 and 170,240.20

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Solution

The fourth proportional to 485,816.20, 728,594.70 and 170,240.20 is: 255,314.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,816.20 : 728,594.70 = 170,240.20 : x
  2. Step 2: Convert to fraction form
    485,816.20/728,594.70 = 170,240.20/x
  3. Step 3: Cross multiply
    485,816.20x = 728,594.70 × 170,240.20
  4. Step 4: Simplify right side
    485,816.20x = 124,036,107,446.94
  5. Step 5: Solve for x
    x = 124,036,107,446.94/485,816.20
  6. Step 6: Final answer
    x = 255,314.89

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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.