Home / 1,388.64-2,084.78-977.97

Finding the Fourth Proportional to 1,388.64, 2,084.78 and 977.97

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Solution

The fourth proportional to 1,388.64, 2,084.78 and 977.97 is: 1,468.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.64 : 2,084.78 = 977.97 : x
  2. Step 2: Convert to fraction form
    1,388.64/2,084.78 = 977.97/x
  3. Step 3: Cross multiply
    1,388.64x = 2,084.78 × 977.97
  4. Step 4: Simplify right side
    1,388.64x = 2,038,852.30
  5. Step 5: Solve for x
    x = 2,038,852.30/1,388.64
  6. Step 6: Final answer
    x = 1,468.24

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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.