Home / 5,187.76-7,781.72-1,490.32

Finding the Fourth Proportional to 5,187.76, 7,781.72 and 1,490.32

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Solution

The fourth proportional to 5,187.76, 7,781.72 and 1,490.32 is: 2,235.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.76 : 7,781.72 = 1,490.32 : x
  2. Step 2: Convert to fraction form
    5,187.76/7,781.72 = 1,490.32/x
  3. Step 3: Cross multiply
    5,187.76x = 7,781.72 × 1,490.32
  4. Step 4: Simplify right side
    5,187.76x = 11,597,252.95
  5. Step 5: Solve for x
    x = 11,597,252.95/5,187.76
  6. Step 6: Final answer
    x = 2,235.50

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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.