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Finding the Fourth Proportional to 526.38, 726.40 and 290.35

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Solution

The fourth proportional to 526.38, 726.40 and 290.35 is: 400.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.38 : 726.40 = 290.35 : x
  2. Step 2: Convert to fraction form
    526.38/726.40 = 290.35/x
  3. Step 3: Cross multiply
    526.38x = 726.40 × 290.35
  4. Step 4: Simplify right side
    526.38x = 210,909.54
  5. Step 5: Solve for x
    x = 210,909.54/526.38
  6. Step 6: Final answer
    x = 400.68

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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.