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Finding the Fourth Proportional to 485,816.70, 728,595.45 and 170,240.70

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Solution

The fourth proportional to 485,816.70, 728,595.45 and 170,240.70 is: 255,315.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,816.70 : 728,595.45 = 170,240.70 : x
  2. Step 2: Convert to fraction form
    485,816.70/728,595.45 = 170,240.70/x
  3. Step 3: Cross multiply
    485,816.70x = 728,595.45 × 170,240.70
  4. Step 4: Simplify right side
    485,816.70x = 124,036,599,424.82
  5. Step 5: Solve for x
    x = 124,036,599,424.82/485,816.70
  6. Step 6: Final answer
    x = 255,315.64

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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.