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Finding the Fourth Proportional to 2,393.30, 3,588.75 and 987.45

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Solution

The fourth proportional to 2,393.30, 3,588.75 and 987.45 is: 1,480.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,393.30 : 3,588.75 = 987.45 : x
  2. Step 2: Convert to fraction form
    2,393.30/3,588.75 = 987.45/x
  3. Step 3: Cross multiply
    2,393.30x = 3,588.75 × 987.45
  4. Step 4: Simplify right side
    2,393.30x = 3,543,711.19
  5. Step 5: Solve for x
    x = 3,543,711.19/2,393.30
  6. Step 6: Final answer
    x = 1,480.68

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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.