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Finding the Fourth Proportional to 639.84, 954.84 and 536.16

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Solution

The fourth proportional to 639.84, 954.84 and 536.16 is: 800.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.84 : 954.84 = 536.16 : x
  2. Step 2: Convert to fraction form
    639.84/954.84 = 536.16/x
  3. Step 3: Cross multiply
    639.84x = 954.84 × 536.16
  4. Step 4: Simplify right side
    639.84x = 511,947.01
  5. Step 5: Solve for x
    x = 511,947.01/639.84
  6. Step 6: Final answer
    x = 800.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.