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Finding the Fourth Proportional to 526.80, 723.30 and 427.80

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Solution

The fourth proportional to 526.80, 723.30 and 427.80 is: 587.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.80 : 723.30 = 427.80 : x
  2. Step 2: Convert to fraction form
    526.80/723.30 = 427.80/x
  3. Step 3: Cross multiply
    526.80x = 723.30 × 427.80
  4. Step 4: Simplify right side
    526.80x = 309,427.74
  5. Step 5: Solve for x
    x = 309,427.74/526.80
  6. Step 6: Final answer
    x = 587.37

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.