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Finding the Fourth Proportional to 938.07, 1,407.09 and 254.07

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Solution

The fourth proportional to 938.07, 1,407.09 and 254.07 is: 381.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.07 : 1,407.09 = 254.07 : x
  2. Step 2: Convert to fraction form
    938.07/1,407.09 = 254.07/x
  3. Step 3: Cross multiply
    938.07x = 1,407.09 × 254.07
  4. Step 4: Simplify right side
    938.07x = 357,499.36
  5. Step 5: Solve for x
    x = 357,499.36/938.07
  6. Step 6: Final answer
    x = 381.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.