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Finding the Fourth Proportional to 434.92, 652.79 and 290.74

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Solution

The fourth proportional to 434.92, 652.79 and 290.74 is: 436.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.92 : 652.79 = 290.74 : x
  2. Step 2: Convert to fraction form
    434.92/652.79 = 290.74/x
  3. Step 3: Cross multiply
    434.92x = 652.79 × 290.74
  4. Step 4: Simplify right side
    434.92x = 189,792.16
  5. Step 5: Solve for x
    x = 189,792.16/434.92
  6. Step 6: Final answer
    x = 436.38

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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.