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Finding the Fourth Proportional to 434.28, 598.68 and 309.88

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Solution

The fourth proportional to 434.28, 598.68 and 309.88 is: 427.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.28 : 598.68 = 309.88 : x
  2. Step 2: Convert to fraction form
    434.28/598.68 = 309.88/x
  3. Step 3: Cross multiply
    434.28x = 598.68 × 309.88
  4. Step 4: Simplify right side
    434.28x = 185,518.96
  5. Step 5: Solve for x
    x = 185,518.96/434.28
  6. Step 6: Final answer
    x = 427.19

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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.