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Finding the Fourth Proportional to 2,740.79, 4,110.10 and 891.45

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Solution

The fourth proportional to 2,740.79, 4,110.10 and 891.45 is: 1,336.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,740.79 : 4,110.10 = 891.45 : x
  2. Step 2: Convert to fraction form
    2,740.79/4,110.10 = 891.45/x
  3. Step 3: Cross multiply
    2,740.79x = 4,110.10 × 891.45
  4. Step 4: Simplify right side
    2,740.79x = 3,663,948.65
  5. Step 5: Solve for x
    x = 3,663,948.65/2,740.79
  6. Step 6: Final answer
    x = 1,336.82

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1.5x scale

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.