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Finding the Fourth Proportional to 1,130.61, 1,694.34 and 512.81

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Solution

The fourth proportional to 1,130.61, 1,694.34 and 512.81 is: 768.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.61 : 1,694.34 = 512.81 : x
  2. Step 2: Convert to fraction form
    1,130.61/1,694.34 = 512.81/x
  3. Step 3: Cross multiply
    1,130.61x = 1,694.34 × 512.81
  4. Step 4: Simplify right side
    1,130.61x = 868,866.02
  5. Step 5: Solve for x
    x = 868,866.02/1,130.61
  6. Step 6: Final answer
    x = 768.49

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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.