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Finding the Fourth Proportional to 526.34, 725.13 and 378.72

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Solution

The fourth proportional to 526.34, 725.13 and 378.72 is: 521.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.34 : 725.13 = 378.72 : x
  2. Step 2: Convert to fraction form
    526.34/725.13 = 378.72/x
  3. Step 3: Cross multiply
    526.34x = 725.13 × 378.72
  4. Step 4: Simplify right side
    526.34x = 274,621.23
  5. Step 5: Solve for x
    x = 274,621.23/526.34
  6. Step 6: Final answer
    x = 521.76

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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.