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Finding the Fourth Proportional to 894.38, 1,234.30 and 521.36

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Solution

The fourth proportional to 894.38, 1,234.30 and 521.36 is: 719.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.38 : 1,234.30 = 521.36 : x
  2. Step 2: Convert to fraction form
    894.38/1,234.30 = 521.36/x
  3. Step 3: Cross multiply
    894.38x = 1,234.30 × 521.36
  4. Step 4: Simplify right side
    894.38x = 643,514.65
  5. Step 5: Solve for x
    x = 643,514.65/894.38
  6. Step 6: Final answer
    x = 719.51

Related Problems

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Half scale
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Double scale
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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.