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Finding the Fourth Proportional to 630.42, 870.12 and 350.75

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Solution

The fourth proportional to 630.42, 870.12 and 350.75 is: 484.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.42 : 870.12 = 350.75 : x
  2. Step 2: Convert to fraction form
    630.42/870.12 = 350.75/x
  3. Step 3: Cross multiply
    630.42x = 870.12 × 350.75
  4. Step 4: Simplify right side
    630.42x = 305,192.84
  5. Step 5: Solve for x
    x = 305,192.84/630.42
  6. Step 6: Final answer
    x = 484.11

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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.