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Finding the Fourth Proportional to 1,776.89, 2,452.19 and 990.95

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Solution

The fourth proportional to 1,776.89, 2,452.19 and 990.95 is: 1,367.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,776.89 : 2,452.19 = 990.95 : x
  2. Step 2: Convert to fraction form
    1,776.89/2,452.19 = 990.95/x
  3. Step 3: Cross multiply
    1,776.89x = 2,452.19 × 990.95
  4. Step 4: Simplify right side
    1,776.89x = 2,429,980.46
  5. Step 5: Solve for x
    x = 2,429,980.46/1,776.89
  6. Step 6: Final answer
    x = 1,367.55

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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.