Home / 1,124.24-1,681.40-660.88

Finding the Fourth Proportional to 1,124.24, 1,681.40 and 660.88

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Solution

The fourth proportional to 1,124.24, 1,681.40 and 660.88 is: 988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.24 : 1,681.40 = 660.88 : x
  2. Step 2: Convert to fraction form
    1,124.24/1,681.40 = 660.88/x
  3. Step 3: Cross multiply
    1,124.24x = 1,681.40 × 660.88
  4. Step 4: Simplify right side
    1,124.24x = 1,111,203.63
  5. Step 5: Solve for x
    x = 1,111,203.63/1,124.24
  6. Step 6: Final answer
    x = 988.40

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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.