Home / 1,321.76-1,825.26-929.72

Finding the Fourth Proportional to 1,321.76, 1,825.26 and 929.72

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Solution

The fourth proportional to 1,321.76, 1,825.26 and 929.72 is: 1,283.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.76 : 1,825.26 = 929.72 : x
  2. Step 2: Convert to fraction form
    1,321.76/1,825.26 = 929.72/x
  3. Step 3: Cross multiply
    1,321.76x = 1,825.26 × 929.72
  4. Step 4: Simplify right side
    1,321.76x = 1,696,980.73
  5. Step 5: Solve for x
    x = 1,696,980.73/1,321.76
  6. Step 6: Final answer
    x = 1,283.88

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1.5x scale

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.