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Finding the Fourth Proportional to 1,829.86, 2,525.19 and 990.55

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Solution

The fourth proportional to 1,829.86, 2,525.19 and 990.55 is: 1,366.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,829.86 : 2,525.19 = 990.55 : x
  2. Step 2: Convert to fraction form
    1,829.86/2,525.19 = 990.55/x
  3. Step 3: Cross multiply
    1,829.86x = 2,525.19 × 990.55
  4. Step 4: Simplify right side
    1,829.86x = 2,501,331.97
  5. Step 5: Solve for x
    x = 2,501,331.97/1,829.86
  6. Step 6: Final answer
    x = 1,366.95

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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.