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Finding the Fourth Proportional to 1,507.81, 2,261.72 and 412.15

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Solution

The fourth proportional to 1,507.81, 2,261.72 and 412.15 is: 618.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.81 : 2,261.72 = 412.15 : x
  2. Step 2: Convert to fraction form
    1,507.81/2,261.72 = 412.15/x
  3. Step 3: Cross multiply
    1,507.81x = 2,261.72 × 412.15
  4. Step 4: Simplify right side
    1,507.81x = 932,165.84
  5. Step 5: Solve for x
    x = 932,165.84/1,507.81
  6. Step 6: Final answer
    x = 618.23

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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.