Home / 1,226.97-1,688.72-977.49

Finding the Fourth Proportional to 1,226.97, 1,688.72 and 977.49

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Solution

The fourth proportional to 1,226.97, 1,688.72 and 977.49 is: 1,345.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.97 : 1,688.72 = 977.49 : x
  2. Step 2: Convert to fraction form
    1,226.97/1,688.72 = 977.49/x
  3. Step 3: Cross multiply
    1,226.97x = 1,688.72 × 977.49
  4. Step 4: Simplify right side
    1,226.97x = 1,650,702.03
  5. Step 5: Solve for x
    x = 1,650,702.03/1,226.97
  6. Step 6: Final answer
    x = 1,345.35

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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.