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Finding the Fourth Proportional to 688.46, 1,030.83 and 579.11

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Solution

The fourth proportional to 688.46, 1,030.83 and 579.11 is: 867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.46 : 1,030.83 = 579.11 : x
  2. Step 2: Convert to fraction form
    688.46/1,030.83 = 579.11/x
  3. Step 3: Cross multiply
    688.46x = 1,030.83 × 579.11
  4. Step 4: Simplify right side
    688.46x = 596,963.96
  5. Step 5: Solve for x
    x = 596,963.96/688.46
  6. Step 6: Final answer
    x = 867.10

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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.