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Finding the Fourth Proportional to 631.49, 942.20 and 626.63

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Solution

The fourth proportional to 631.49, 942.20 and 626.63 is: 934.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.49 : 942.20 = 626.63 : x
  2. Step 2: Convert to fraction form
    631.49/942.20 = 626.63/x
  3. Step 3: Cross multiply
    631.49x = 942.20 × 626.63
  4. Step 4: Simplify right side
    631.49x = 590,402.94
  5. Step 5: Solve for x
    x = 590,402.94/631.49
  6. Step 6: Final answer
    x = 934.94

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Double scale
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1.5x scale

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.