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Finding the Fourth Proportional to 630.08, 869.36 and 354.08

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Solution

The fourth proportional to 630.08, 869.36 and 354.08 is: 488.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.08 : 869.36 = 354.08 : x
  2. Step 2: Convert to fraction form
    630.08/869.36 = 354.08/x
  3. Step 3: Cross multiply
    630.08x = 869.36 × 354.08
  4. Step 4: Simplify right side
    630.08x = 307,822.99
  5. Step 5: Solve for x
    x = 307,822.99/630.08
  6. Step 6: Final answer
    x = 488.55

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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.