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Finding the Fourth Proportional to 528.55, 790.80 and 346.30

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Solution

The fourth proportional to 528.55, 790.80 and 346.30 is: 518.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.55 : 790.80 = 346.30 : x
  2. Step 2: Convert to fraction form
    528.55/790.80 = 346.30/x
  3. Step 3: Cross multiply
    528.55x = 790.80 × 346.30
  4. Step 4: Simplify right side
    528.55x = 273,854.04
  5. Step 5: Solve for x
    x = 273,854.04/528.55
  6. Step 6: Final answer
    x = 518.12

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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.