Home / 1,111.79-1,534.28-669.70

Finding the Fourth Proportional to 1,111.79, 1,534.28 and 669.70

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Solution

The fourth proportional to 1,111.79, 1,534.28 and 669.70 is: 924.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.79 : 1,534.28 = 669.70 : x
  2. Step 2: Convert to fraction form
    1,111.79/1,534.28 = 669.70/x
  3. Step 3: Cross multiply
    1,111.79x = 1,534.28 × 669.70
  4. Step 4: Simplify right side
    1,111.79x = 1,027,505.89
  5. Step 5: Solve for x
    x = 1,027,505.89/1,111.79
  6. Step 6: Final answer
    x = 924.19

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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.