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Finding the Fourth Proportional to 640.90, 954.59 and 637.93

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Solution

The fourth proportional to 640.90, 954.59 and 637.93 is: 950.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.90 : 954.59 = 637.93 : x
  2. Step 2: Convert to fraction form
    640.90/954.59 = 637.93/x
  3. Step 3: Cross multiply
    640.90x = 954.59 × 637.93
  4. Step 4: Simplify right side
    640.90x = 608,961.60
  5. Step 5: Solve for x
    x = 608,961.60/640.90
  6. Step 6: Final answer
    x = 950.17

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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.