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Finding the Fourth Proportional to 1,059.48, 1,587.33 and 511.38

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Solution

The fourth proportional to 1,059.48, 1,587.33 and 511.38 is: 766.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.48 : 1,587.33 = 511.38 : x
  2. Step 2: Convert to fraction form
    1,059.48/1,587.33 = 511.38/x
  3. Step 3: Cross multiply
    1,059.48x = 1,587.33 × 511.38
  4. Step 4: Simplify right side
    1,059.48x = 811,728.82
  5. Step 5: Solve for x
    x = 811,728.82/1,059.48
  6. Step 6: Final answer
    x = 766.16

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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.