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Finding the Fourth Proportional to 1,215.60, 1,677.72 and 773.04

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Solution

The fourth proportional to 1,215.60, 1,677.72 and 773.04 is: 1,066.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.60 : 1,677.72 = 773.04 : x
  2. Step 2: Convert to fraction form
    1,215.60/1,677.72 = 773.04/x
  3. Step 3: Cross multiply
    1,215.60x = 1,677.72 × 773.04
  4. Step 4: Simplify right side
    1,215.60x = 1,296,944.67
  5. Step 5: Solve for x
    x = 1,296,944.67/1,215.60
  6. Step 6: Final answer
    x = 1,066.92

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1.5x scale

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.