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Finding the Fourth Proportional to 526.55, 726.26 and 386.64

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Solution

The fourth proportional to 526.55, 726.26 and 386.64 is: 533.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.55 : 726.26 = 386.64 : x
  2. Step 2: Convert to fraction form
    526.55/726.26 = 386.64/x
  3. Step 3: Cross multiply
    526.55x = 726.26 × 386.64
  4. Step 4: Simplify right side
    526.55x = 280,799.23
  5. Step 5: Solve for x
    x = 280,799.23/526.55
  6. Step 6: Final answer
    x = 533.29

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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.