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Finding the Fourth Proportional to 526.23, 725.90 and 378.68

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Solution

The fourth proportional to 526.23, 725.90 and 378.68 is: 522.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.23 : 725.90 = 378.68 : x
  2. Step 2: Convert to fraction form
    526.23/725.90 = 378.68/x
  3. Step 3: Cross multiply
    526.23x = 725.90 × 378.68
  4. Step 4: Simplify right side
    526.23x = 274,878.29
  5. Step 5: Solve for x
    x = 274,878.29/526.23
  6. Step 6: Final answer
    x = 522.35

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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.