Home / 1,661.16-2,486.88-929.76

Finding the Fourth Proportional to 1,661.16, 2,486.88 and 929.76

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Solution

The fourth proportional to 1,661.16, 2,486.88 and 929.76 is: 1,391.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.16 : 2,486.88 = 929.76 : x
  2. Step 2: Convert to fraction form
    1,661.16/2,486.88 = 929.76/x
  3. Step 3: Cross multiply
    1,661.16x = 2,486.88 × 929.76
  4. Step 4: Simplify right side
    1,661.16x = 2,312,201.55
  5. Step 5: Solve for x
    x = 2,312,201.55/1,661.16
  6. Step 6: Final answer
    x = 1,391.92

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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.