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Finding the Fourth Proportional to 1,240.42, 1,860.08 and 624.01

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Solution

The fourth proportional to 1,240.42, 1,860.08 and 624.01 is: 935.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.42 : 1,860.08 = 624.01 : x
  2. Step 2: Convert to fraction form
    1,240.42/1,860.08 = 624.01/x
  3. Step 3: Cross multiply
    1,240.42x = 1,860.08 × 624.01
  4. Step 4: Simplify right side
    1,240.42x = 1,160,708.52
  5. Step 5: Solve for x
    x = 1,160,708.52/1,240.42
  6. Step 6: Final answer
    x = 935.74

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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.