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Finding the Fourth Proportional to 1,029.59, 1,545.30 and 823.65

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Solution

The fourth proportional to 1,029.59, 1,545.30 and 823.65 is: 1,236.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.59 : 1,545.30 = 823.65 : x
  2. Step 2: Convert to fraction form
    1,029.59/1,545.30 = 823.65/x
  3. Step 3: Cross multiply
    1,029.59x = 1,545.30 × 823.65
  4. Step 4: Simplify right side
    1,029.59x = 1,272,786.35
  5. Step 5: Solve for x
    x = 1,272,786.35/1,029.59
  6. Step 6: Final answer
    x = 1,236.20

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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.