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Finding the Fourth Proportional to 435.78, 652.86 and 339.12

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Solution

The fourth proportional to 435.78, 652.86 and 339.12 is: 508.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.78 : 652.86 = 339.12 : x
  2. Step 2: Convert to fraction form
    435.78/652.86 = 339.12/x
  3. Step 3: Cross multiply
    435.78x = 652.86 × 339.12
  4. Step 4: Simplify right side
    435.78x = 221,397.88
  5. Step 5: Solve for x
    x = 221,397.88/435.78
  6. Step 6: Final answer
    x = 508.05

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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.