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Finding the Fourth Proportional to 687.24, 1,030.64 and 362.44

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Solution

The fourth proportional to 687.24, 1,030.64 and 362.44 is: 543.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.24 : 1,030.64 = 362.44 : x
  2. Step 2: Convert to fraction form
    687.24/1,030.64 = 362.44/x
  3. Step 3: Cross multiply
    687.24x = 1,030.64 × 362.44
  4. Step 4: Simplify right side
    687.24x = 373,545.16
  5. Step 5: Solve for x
    x = 373,545.16/687.24
  6. Step 6: Final answer
    x = 543.54

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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.