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Finding the Fourth Proportional to 434.99, 652.60 and 215.68

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Solution

The fourth proportional to 434.99, 652.60 and 215.68 is: 323.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.99 : 652.60 = 215.68 : x
  2. Step 2: Convert to fraction form
    434.99/652.60 = 215.68/x
  3. Step 3: Cross multiply
    434.99x = 652.60 × 215.68
  4. Step 4: Simplify right side
    434.99x = 140,752.77
  5. Step 5: Solve for x
    x = 140,752.77/434.99
  6. Step 6: Final answer
    x = 323.58

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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.