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Finding the Fourth Proportional to 1,241.68, 1,862.73 and 420.01

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Solution

The fourth proportional to 1,241.68, 1,862.73 and 420.01 is: 630.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.68 : 1,862.73 = 420.01 : x
  2. Step 2: Convert to fraction form
    1,241.68/1,862.73 = 420.01/x
  3. Step 3: Cross multiply
    1,241.68x = 1,862.73 × 420.01
  4. Step 4: Simplify right side
    1,241.68x = 782,353.81
  5. Step 5: Solve for x
    x = 782,353.81/1,241.68
  6. Step 6: Final answer
    x = 630.08

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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.