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Finding the Fourth Proportional to 1,021.93, 1,410.25 and 938.25

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Solution

The fourth proportional to 1,021.93, 1,410.25 and 938.25 is: 1,294.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.93 : 1,410.25 = 938.25 : x
  2. Step 2: Convert to fraction form
    1,021.93/1,410.25 = 938.25/x
  3. Step 3: Cross multiply
    1,021.93x = 1,410.25 × 938.25
  4. Step 4: Simplify right side
    1,021.93x = 1,323,169.11
  5. Step 5: Solve for x
    x = 1,323,169.11/1,021.93
  6. Step 6: Final answer
    x = 1,294.77

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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.