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Finding the Fourth Proportional to 646.21, 961.02 and 625.70

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Solution

The fourth proportional to 646.21, 961.02 and 625.70 is: 930.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.21 : 961.02 = 625.70 : x
  2. Step 2: Convert to fraction form
    646.21/961.02 = 625.70/x
  3. Step 3: Cross multiply
    646.21x = 961.02 × 625.70
  4. Step 4: Simplify right side
    646.21x = 601,312.62
  5. Step 5: Solve for x
    x = 601,312.62/646.21
  6. Step 6: Final answer
    x = 930.53

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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.