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Finding the Fourth Proportional to 1,035.24, 1,428.62 and 587.11

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Solution

The fourth proportional to 1,035.24, 1,428.62 and 587.11 is: 810.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.24 : 1,428.62 = 587.11 : x
  2. Step 2: Convert to fraction form
    1,035.24/1,428.62 = 587.11/x
  3. Step 3: Cross multiply
    1,035.24x = 1,428.62 × 587.11
  4. Step 4: Simplify right side
    1,035.24x = 838,749.95
  5. Step 5: Solve for x
    x = 838,749.95/1,035.24
  6. Step 6: Final answer
    x = 810.20

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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.