Home / 1,005.27-1,387.49-612.55

Finding the Fourth Proportional to 1,005.27, 1,387.49 and 612.55

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Solution

The fourth proportional to 1,005.27, 1,387.49 and 612.55 is: 845.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005.27 : 1,387.49 = 612.55 : x
  2. Step 2: Convert to fraction form
    1,005.27/1,387.49 = 612.55/x
  3. Step 3: Cross multiply
    1,005.27x = 1,387.49 × 612.55
  4. Step 4: Simplify right side
    1,005.27x = 849,907.00
  5. Step 5: Solve for x
    x = 849,907.00/1,005.27
  6. Step 6: Final answer
    x = 845.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.