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Finding the Fourth Proportional to 2,925.78, 4,388.76 and 873.78

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Solution

The fourth proportional to 2,925.78, 4,388.76 and 873.78 is: 1,310.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,925.78 : 4,388.76 = 873.78 : x
  2. Step 2: Convert to fraction form
    2,925.78/4,388.76 = 873.78/x
  3. Step 3: Cross multiply
    2,925.78x = 4,388.76 × 873.78
  4. Step 4: Simplify right side
    2,925.78x = 3,834,810.71
  5. Step 5: Solve for x
    x = 3,834,810.71/2,925.78
  6. Step 6: Final answer
    x = 1,310.70

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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.