Home / 1,127.10-1,690.79-477.75

Finding the Fourth Proportional to 1,127.10, 1,690.79 and 477.75

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Solution

The fourth proportional to 1,127.10, 1,690.79 and 477.75 is: 716.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.10 : 1,690.79 = 477.75 : x
  2. Step 2: Convert to fraction form
    1,127.10/1,690.79 = 477.75/x
  3. Step 3: Cross multiply
    1,127.10x = 1,690.79 × 477.75
  4. Step 4: Simplify right side
    1,127.10x = 807,772.53
  5. Step 5: Solve for x
    x = 807,772.53/1,127.10
  6. Step 6: Final answer
    x = 716.68

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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.