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Finding the Fourth Proportional to 1,270.31, 1,752.95 and 798.19

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Solution

The fourth proportional to 1,270.31, 1,752.95 and 798.19 is: 1,101.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.31 : 1,752.95 = 798.19 : x
  2. Step 2: Convert to fraction form
    1,270.31/1,752.95 = 798.19/x
  3. Step 3: Cross multiply
    1,270.31x = 1,752.95 × 798.19
  4. Step 4: Simplify right side
    1,270.31x = 1,399,182.53
  5. Step 5: Solve for x
    x = 1,399,182.53/1,270.31
  6. Step 6: Final answer
    x = 1,101.45

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Double scale
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1.5x scale

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.