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Finding the Fourth Proportional to 913.42, 1,260.75 and 626.68

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Solution

The fourth proportional to 913.42, 1,260.75 and 626.68 is: 864.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.42 : 1,260.75 = 626.68 : x
  2. Step 2: Convert to fraction form
    913.42/1,260.75 = 626.68/x
  3. Step 3: Cross multiply
    913.42x = 1,260.75 × 626.68
  4. Step 4: Simplify right side
    913.42x = 790,086.81
  5. Step 5: Solve for x
    x = 790,086.81/913.42
  6. Step 6: Final answer
    x = 864.98

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Double scale
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1.5x scale

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.