Home / 1,127.31-1,690.65-477.60

Finding the Fourth Proportional to 1,127.31, 1,690.65 and 477.60

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Solution

The fourth proportional to 1,127.31, 1,690.65 and 477.60 is: 716.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.31 : 1,690.65 = 477.60 : x
  2. Step 2: Convert to fraction form
    1,127.31/1,690.65 = 477.60/x
  3. Step 3: Cross multiply
    1,127.31x = 1,690.65 × 477.60
  4. Step 4: Simplify right side
    1,127.31x = 807,454.44
  5. Step 5: Solve for x
    x = 807,454.44/1,127.31
  6. Step 6: Final answer
    x = 716.27

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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.