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Finding the Fourth Proportional to 434.38, 599.40 and 259.70

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Solution

The fourth proportional to 434.38, 599.40 and 259.70 is: 358.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.38 : 599.40 = 259.70 : x
  2. Step 2: Convert to fraction form
    434.38/599.40 = 259.70/x
  3. Step 3: Cross multiply
    434.38x = 599.40 × 259.70
  4. Step 4: Simplify right side
    434.38x = 155,664.18
  5. Step 5: Solve for x
    x = 155,664.18/434.38
  6. Step 6: Final answer
    x = 358.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.