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Finding the Fourth Proportional to 528.04, 790.56 and 345.04

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Solution

The fourth proportional to 528.04, 790.56 and 345.04 is: 516.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.04 : 790.56 = 345.04 : x
  2. Step 2: Convert to fraction form
    528.04/790.56 = 345.04/x
  3. Step 3: Cross multiply
    528.04x = 790.56 × 345.04
  4. Step 4: Simplify right side
    528.04x = 272,774.82
  5. Step 5: Solve for x
    x = 272,774.82/528.04
  6. Step 6: Final answer
    x = 516.58

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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.