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Finding the Fourth Proportional to 1,377.77, 1,900.84 and 880.70

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Solution

The fourth proportional to 1,377.77, 1,900.84 and 880.70 is: 1,215.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.77 : 1,900.84 = 880.70 : x
  2. Step 2: Convert to fraction form
    1,377.77/1,900.84 = 880.70/x
  3. Step 3: Cross multiply
    1,377.77x = 1,900.84 × 880.70
  4. Step 4: Simplify right side
    1,377.77x = 1,674,058.08
  5. Step 5: Solve for x
    x = 1,674,058.08/1,377.77
  6. Step 6: Final answer
    x = 1,215.05

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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.