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Finding the Fourth Proportional to 1,362.40, 1,880.06 and 741.40

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Solution

The fourth proportional to 1,362.40, 1,880.06 and 741.40 is: 1,023.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.40 : 1,880.06 = 741.40 : x
  2. Step 2: Convert to fraction form
    1,362.40/1,880.06 = 741.40/x
  3. Step 3: Cross multiply
    1,362.40x = 1,880.06 × 741.40
  4. Step 4: Simplify right side
    1,362.40x = 1,393,876.48
  5. Step 5: Solve for x
    x = 1,393,876.48/1,362.40
  6. Step 6: Final answer
    x = 1,023.10

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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.