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Finding the Fourth Proportional to 526.88, 790.32 and 218.90

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Solution

The fourth proportional to 526.88, 790.32 and 218.90 is: 328.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.88 : 790.32 = 218.90 : x
  2. Step 2: Convert to fraction form
    526.88/790.32 = 218.90/x
  3. Step 3: Cross multiply
    526.88x = 790.32 × 218.90
  4. Step 4: Simplify right side
    526.88x = 172,997.10
  5. Step 5: Solve for x
    x = 172,997.10/526.88
  6. Step 6: Final answer
    x = 328.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.