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Finding the Fourth Proportional to 938.55, 1,294.74 and 607.26

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Solution

The fourth proportional to 938.55, 1,294.74 and 607.26 is: 837.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.55 : 1,294.74 = 607.26 : x
  2. Step 2: Convert to fraction form
    938.55/1,294.74 = 607.26/x
  3. Step 3: Cross multiply
    938.55x = 1,294.74 × 607.26
  4. Step 4: Simplify right side
    938.55x = 786,243.81
  5. Step 5: Solve for x
    x = 786,243.81/938.55
  6. Step 6: Final answer
    x = 837.72

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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.