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Finding the Fourth Proportional to 1,038.94, 1,433.97 and 660.94

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Solution

The fourth proportional to 1,038.94, 1,433.97 and 660.94 is: 912.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.94 : 1,433.97 = 660.94 : x
  2. Step 2: Convert to fraction form
    1,038.94/1,433.97 = 660.94/x
  3. Step 3: Cross multiply
    1,038.94x = 1,433.97 × 660.94
  4. Step 4: Simplify right side
    1,038.94x = 947,768.13
  5. Step 5: Solve for x
    x = 947,768.13/1,038.94
  6. Step 6: Final answer
    x = 912.25

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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.