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Finding the Fourth Proportional to 894.71, 1,234.38 and 521.55

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Solution

The fourth proportional to 894.71, 1,234.38 and 521.55 is: 719.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.71 : 1,234.38 = 521.55 : x
  2. Step 2: Convert to fraction form
    894.71/1,234.38 = 521.55/x
  3. Step 3: Cross multiply
    894.71x = 1,234.38 × 521.55
  4. Step 4: Simplify right side
    894.71x = 643,790.89
  5. Step 5: Solve for x
    x = 643,790.89/894.71
  6. Step 6: Final answer
    x = 719.55

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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.