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Finding the Fourth Proportional to 645.84, 891.28 and 366.06

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Solution

The fourth proportional to 645.84, 891.28 and 366.06 is: 505.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.84 : 891.28 = 366.06 : x
  2. Step 2: Convert to fraction form
    645.84/891.28 = 366.06/x
  3. Step 3: Cross multiply
    645.84x = 891.28 × 366.06
  4. Step 4: Simplify right side
    645.84x = 326,261.96
  5. Step 5: Solve for x
    x = 326,261.96/645.84
  6. Step 6: Final answer
    x = 505.17

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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.