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Finding the Fourth Proportional to 526.59, 790.20 and 485.28

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Solution

The fourth proportional to 526.59, 790.20 and 485.28 is: 728.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.59 : 790.20 = 485.28 : x
  2. Step 2: Convert to fraction form
    526.59/790.20 = 485.28/x
  3. Step 3: Cross multiply
    526.59x = 790.20 × 485.28
  4. Step 4: Simplify right side
    526.59x = 383,468.26
  5. Step 5: Solve for x
    x = 383,468.26/526.59
  6. Step 6: Final answer
    x = 728.21

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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.