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Finding the Fourth Proportional to 1,356.28, 2,032.88 and 807.31

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Solution

The fourth proportional to 1,356.28, 2,032.88 and 807.31 is: 1,210.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.28 : 2,032.88 = 807.31 : x
  2. Step 2: Convert to fraction form
    1,356.28/2,032.88 = 807.31/x
  3. Step 3: Cross multiply
    1,356.28x = 2,032.88 × 807.31
  4. Step 4: Simplify right side
    1,356.28x = 1,641,169.37
  5. Step 5: Solve for x
    x = 1,641,169.37/1,356.28
  6. Step 6: Final answer
    x = 1,210.05

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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.