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Finding the Fourth Proportional to 1,325.54, 1,987.01 and 740.82

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Solution

The fourth proportional to 1,325.54, 1,987.01 and 740.82 is: 1,110.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.54 : 1,987.01 = 740.82 : x
  2. Step 2: Convert to fraction form
    1,325.54/1,987.01 = 740.82/x
  3. Step 3: Cross multiply
    1,325.54x = 1,987.01 × 740.82
  4. Step 4: Simplify right side
    1,325.54x = 1,472,013.04
  5. Step 5: Solve for x
    x = 1,472,013.04/1,325.54
  6. Step 6: Final answer
    x = 1,110.50

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1.5x scale

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.