Home / 727.12-1,091.16-557.20

Finding the Fourth Proportional to 727.12, 1,091.16 and 557.20

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Solution

The fourth proportional to 727.12, 1,091.16 and 557.20 is: 836.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.12 : 1,091.16 = 557.20 : x
  2. Step 2: Convert to fraction form
    727.12/1,091.16 = 557.20/x
  3. Step 3: Cross multiply
    727.12x = 1,091.16 × 557.20
  4. Step 4: Simplify right side
    727.12x = 607,994.35
  5. Step 5: Solve for x
    x = 607,994.35/727.12
  6. Step 6: Final answer
    x = 836.17

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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.