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Finding the Fourth Proportional to 622.18, 858.90 and 360.15

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Solution

The fourth proportional to 622.18, 858.90 and 360.15 is: 497.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.18 : 858.90 = 360.15 : x
  2. Step 2: Convert to fraction form
    622.18/858.90 = 360.15/x
  3. Step 3: Cross multiply
    622.18x = 858.90 × 360.15
  4. Step 4: Simplify right side
    622.18x = 309,332.84
  5. Step 5: Solve for x
    x = 309,332.84/622.18
  6. Step 6: Final answer
    x = 497.18

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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.