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Finding the Fourth Proportional to 1,240.40, 1,860.34 and 374.64

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Solution

The fourth proportional to 1,240.40, 1,860.34 and 374.64 is: 561.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.40 : 1,860.34 = 374.64 : x
  2. Step 2: Convert to fraction form
    1,240.40/1,860.34 = 374.64/x
  3. Step 3: Cross multiply
    1,240.40x = 1,860.34 × 374.64
  4. Step 4: Simplify right side
    1,240.40x = 696,957.78
  5. Step 5: Solve for x
    x = 696,957.78/1,240.40
  6. Step 6: Final answer
    x = 561.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.