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Finding the Fourth Proportional to 435.90, 652.65 and 339.90

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Solution

The fourth proportional to 435.90, 652.65 and 339.90 is: 508.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.90 : 652.65 = 339.90 : x
  2. Step 2: Convert to fraction form
    435.90/652.65 = 339.90/x
  3. Step 3: Cross multiply
    435.90x = 652.65 × 339.90
  4. Step 4: Simplify right side
    435.90x = 221,835.74
  5. Step 5: Solve for x
    x = 221,835.74/435.90
  6. Step 6: Final answer
    x = 508.91

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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.