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Finding the Fourth Proportional to 526.90, 726.62 and 394.44

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Solution

The fourth proportional to 526.90, 726.62 and 394.44 is: 543.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.90 : 726.62 = 394.44 : x
  2. Step 2: Convert to fraction form
    526.90/726.62 = 394.44/x
  3. Step 3: Cross multiply
    526.90x = 726.62 × 394.44
  4. Step 4: Simplify right side
    526.90x = 286,605.51
  5. Step 5: Solve for x
    x = 286,605.51/526.90
  6. Step 6: Final answer
    x = 543.95

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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.