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Finding the Fourth Proportional to 2,077.48, 3,115.88 and 690.96

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Solution

The fourth proportional to 2,077.48, 3,115.88 and 690.96 is: 1,036.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,077.48 : 3,115.88 = 690.96 : x
  2. Step 2: Convert to fraction form
    2,077.48/3,115.88 = 690.96/x
  3. Step 3: Cross multiply
    2,077.48x = 3,115.88 × 690.96
  4. Step 4: Simplify right side
    2,077.48x = 2,152,957.32
  5. Step 5: Solve for x
    x = 2,152,957.32/2,077.48
  6. Step 6: Final answer
    x = 1,036.33

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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.