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Finding the Fourth Proportional to 1,476.88, 2,215.60 and 436.90

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Solution

The fourth proportional to 1,476.88, 2,215.60 and 436.90 is: 655.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,476.88 : 2,215.60 = 436.90 : x
  2. Step 2: Convert to fraction form
    1,476.88/2,215.60 = 436.90/x
  3. Step 3: Cross multiply
    1,476.88x = 2,215.60 × 436.90
  4. Step 4: Simplify right side
    1,476.88x = 967,995.64
  5. Step 5: Solve for x
    x = 967,995.64/1,476.88
  6. Step 6: Final answer
    x = 655.43

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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.