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Finding the Fourth Proportional to 1,091.16, 1,636.56 and 570.84

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Solution

The fourth proportional to 1,091.16, 1,636.56 and 570.84 is: 856.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.16 : 1,636.56 = 570.84 : x
  2. Step 2: Convert to fraction form
    1,091.16/1,636.56 = 570.84/x
  3. Step 3: Cross multiply
    1,091.16x = 1,636.56 × 570.84
  4. Step 4: Simplify right side
    1,091.16x = 934,213.91
  5. Step 5: Solve for x
    x = 934,213.91/1,091.16
  6. Step 6: Final answer
    x = 856.17

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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.