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Finding the Fourth Proportional to 1,594.33, 2,391.40 and 978.13

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Solution

The fourth proportional to 1,594.33, 2,391.40 and 978.13 is: 1,467.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,594.33 : 2,391.40 = 978.13 : x
  2. Step 2: Convert to fraction form
    1,594.33/2,391.40 = 978.13/x
  3. Step 3: Cross multiply
    1,594.33x = 2,391.40 × 978.13
  4. Step 4: Simplify right side
    1,594.33x = 2,339,100.08
  5. Step 5: Solve for x
    x = 2,339,100.08/1,594.33
  6. Step 6: Final answer
    x = 1,467.14

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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.