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Finding the Fourth Proportional to 3,560.68, 4,913.74 and 1,988.78

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Solution

The fourth proportional to 3,560.68, 4,913.74 and 1,988.78 is: 2,744.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,560.68 : 4,913.74 = 1,988.78 : x
  2. Step 2: Convert to fraction form
    3,560.68/4,913.74 = 1,988.78/x
  3. Step 3: Cross multiply
    3,560.68x = 4,913.74 × 1,988.78
  4. Step 4: Simplify right side
    3,560.68x = 9,772,347.84
  5. Step 5: Solve for x
    x = 9,772,347.84/3,560.68
  6. Step 6: Final answer
    x = 2,744.52

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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.