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Finding the Fourth Proportional to 1,330.40, 1,836 and 740.94

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Solution

The fourth proportional to 1,330.40, 1,836 and 740.94 is: 1,022.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.40 : 1,836 = 740.94 : x
  2. Step 2: Convert to fraction form
    1,330.40/1,836 = 740.94/x
  3. Step 3: Cross multiply
    1,330.40x = 1,836 × 740.94
  4. Step 4: Simplify right side
    1,330.40x = 1,360,365.84
  5. Step 5: Solve for x
    x = 1,360,365.84/1,330.40
  6. Step 6: Final answer
    x = 1,022.53

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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.