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Finding the Fourth Proportional to 1,544.66, 2,131.49 and 915.07

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Solution

The fourth proportional to 1,544.66, 2,131.49 and 915.07 is: 1,262.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,544.66 : 2,131.49 = 915.07 : x
  2. Step 2: Convert to fraction form
    1,544.66/2,131.49 = 915.07/x
  3. Step 3: Cross multiply
    1,544.66x = 2,131.49 × 915.07
  4. Step 4: Simplify right side
    1,544.66x = 1,950,473.22
  5. Step 5: Solve for x
    x = 1,950,473.22/1,544.66
  6. Step 6: Final answer
    x = 1,262.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.