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Finding the Fourth Proportional to 434.68, 598.40 and 393.11

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Solution

The fourth proportional to 434.68, 598.40 and 393.11 is: 541.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.68 : 598.40 = 393.11 : x
  2. Step 2: Convert to fraction form
    434.68/598.40 = 393.11/x
  3. Step 3: Cross multiply
    434.68x = 598.40 × 393.11
  4. Step 4: Simplify right side
    434.68x = 235,237.02
  5. Step 5: Solve for x
    x = 235,237.02/434.68
  6. Step 6: Final answer
    x = 541.17

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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.