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Finding the Fourth Proportional to 895.89, 1,234.80 and 630.42

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Solution

The fourth proportional to 895.89, 1,234.80 and 630.42 is: 868.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.89 : 1,234.80 = 630.42 : x
  2. Step 2: Convert to fraction form
    895.89/1,234.80 = 630.42/x
  3. Step 3: Cross multiply
    895.89x = 1,234.80 × 630.42
  4. Step 4: Simplify right side
    895.89x = 778,442.62
  5. Step 5: Solve for x
    x = 778,442.62/895.89
  6. Step 6: Final answer
    x = 868.90

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1.5x scale

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.