Home / 1,140.02-1,573.25-642.66

Finding the Fourth Proportional to 1,140.02, 1,573.25 and 642.66

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Solution

The fourth proportional to 1,140.02, 1,573.25 and 642.66 is: 886.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.02 : 1,573.25 = 642.66 : x
  2. Step 2: Convert to fraction form
    1,140.02/1,573.25 = 642.66/x
  3. Step 3: Cross multiply
    1,140.02x = 1,573.25 × 642.66
  4. Step 4: Simplify right side
    1,140.02x = 1,011,061.96
  5. Step 5: Solve for x
    x = 1,011,061.96/1,140.02
  6. Step 6: Final answer
    x = 886.88

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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.