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Finding the Fourth Proportional to 1,474.81, 2,036.08 and 978.13

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Solution

The fourth proportional to 1,474.81, 2,036.08 and 978.13 is: 1,350.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,474.81 : 2,036.08 = 978.13 : x
  2. Step 2: Convert to fraction form
    1,474.81/2,036.08 = 978.13/x
  3. Step 3: Cross multiply
    1,474.81x = 2,036.08 × 978.13
  4. Step 4: Simplify right side
    1,474.81x = 1,991,550.93
  5. Step 5: Solve for x
    x = 1,991,550.93/1,474.81
  6. Step 6: Final answer
    x = 1,350.38

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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.