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Finding the Fourth Proportional to 1,240.32, 1,860.14 and 374.42

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Solution

The fourth proportional to 1,240.32, 1,860.14 and 374.42 is: 561.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.32 : 1,860.14 = 374.42 : x
  2. Step 2: Convert to fraction form
    1,240.32/1,860.14 = 374.42/x
  3. Step 3: Cross multiply
    1,240.32x = 1,860.14 × 374.42
  4. Step 4: Simplify right side
    1,240.32x = 696,473.62
  5. Step 5: Solve for x
    x = 696,473.62/1,240.32
  6. Step 6: Final answer
    x = 561.53

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1.5x scale

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.