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Finding the Fourth Proportional to 2,957.70, 4,436.53 and 877.71

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Solution

The fourth proportional to 2,957.70, 4,436.53 and 877.71 is: 1,316.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,957.70 : 4,436.53 = 877.71 : x
  2. Step 2: Convert to fraction form
    2,957.70/4,436.53 = 877.71/x
  3. Step 3: Cross multiply
    2,957.70x = 4,436.53 × 877.71
  4. Step 4: Simplify right side
    2,957.70x = 3,893,986.75
  5. Step 5: Solve for x
    x = 3,893,986.75/2,957.70
  6. Step 6: Final answer
    x = 1,316.56

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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.