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Finding the Fourth Proportional to 526.78, 726.20 and 368.92

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Solution

The fourth proportional to 526.78, 726.20 and 368.92 is: 508.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.78 : 726.20 = 368.92 : x
  2. Step 2: Convert to fraction form
    526.78/726.20 = 368.92/x
  3. Step 3: Cross multiply
    526.78x = 726.20 × 368.92
  4. Step 4: Simplify right side
    526.78x = 267,907.86
  5. Step 5: Solve for x
    x = 267,907.86/526.78
  6. Step 6: Final answer
    x = 508.58

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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.