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Finding the Fourth Proportional to 1,544.42, 2,131.38 and 915.32

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Solution

The fourth proportional to 1,544.42, 2,131.38 and 915.32 is: 1,263.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,544.42 : 2,131.38 = 915.32 : x
  2. Step 2: Convert to fraction form
    1,544.42/2,131.38 = 915.32/x
  3. Step 3: Cross multiply
    1,544.42x = 2,131.38 × 915.32
  4. Step 4: Simplify right side
    1,544.42x = 1,950,884.08
  5. Step 5: Solve for x
    x = 1,950,884.08/1,544.42
  6. Step 6: Final answer
    x = 1,263.19

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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.