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Finding the Fourth Proportional to 1,349.81, 1,862.40 and 1,035.40

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Solution

The fourth proportional to 1,349.81, 1,862.40 and 1,035.40 is: 1,428.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.81 : 1,862.40 = 1,035.40 : x
  2. Step 2: Convert to fraction form
    1,349.81/1,862.40 = 1,035.40/x
  3. Step 3: Cross multiply
    1,349.81x = 1,862.40 × 1,035.40
  4. Step 4: Simplify right side
    1,349.81x = 1,928,328.96
  5. Step 5: Solve for x
    x = 1,928,328.96/1,349.81
  6. Step 6: Final answer
    x = 1,428.59

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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.