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Finding the Fourth Proportional to 434.10, 649.54 and 260.86

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Solution

The fourth proportional to 434.10, 649.54 and 260.86 is: 390.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.10 : 649.54 = 260.86 : x
  2. Step 2: Convert to fraction form
    434.10/649.54 = 260.86/x
  3. Step 3: Cross multiply
    434.10x = 649.54 × 260.86
  4. Step 4: Simplify right side
    434.10x = 169,439.00
  5. Step 5: Solve for x
    x = 169,439.00/434.10
  6. Step 6: Final answer
    x = 390.32

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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.