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Finding the Fourth Proportional to 1,140, 1,718.97 and 926.16

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Solution

The fourth proportional to 1,140, 1,718.97 and 926.16 is: 1,396.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140 : 1,718.97 = 926.16 : x
  2. Step 2: Convert to fraction form
    1,140/1,718.97 = 926.16/x
  3. Step 3: Cross multiply
    1,140x = 1,718.97 × 926.16
  4. Step 4: Simplify right side
    1,140x = 1,592,041.26
  5. Step 5: Solve for x
    x = 1,592,041.26/1,140
  6. Step 6: Final answer
    x = 1,396.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.