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Finding the Fourth Proportional to 360.19, 497.18 and 311.59

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Solution

The fourth proportional to 360.19, 497.18 and 311.59 is: 430.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.19 : 497.18 = 311.59 : x
  2. Step 2: Convert to fraction form
    360.19/497.18 = 311.59/x
  3. Step 3: Cross multiply
    360.19x = 497.18 × 311.59
  4. Step 4: Simplify right side
    360.19x = 154,916.32
  5. Step 5: Solve for x
    x = 154,916.32/360.19
  6. Step 6: Final answer
    x = 430.10

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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.