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Finding the Fourth Proportional to 1,445.90, 2,168.85 and 521.49

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Solution

The fourth proportional to 1,445.90, 2,168.85 and 521.49 is: 782.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.90 : 2,168.85 = 521.49 : x
  2. Step 2: Convert to fraction form
    1,445.90/2,168.85 = 521.49/x
  3. Step 3: Cross multiply
    1,445.90x = 2,168.85 × 521.49
  4. Step 4: Simplify right side
    1,445.90x = 1,131,033.59
  5. Step 5: Solve for x
    x = 1,131,033.59/1,445.90
  6. Step 6: Final answer
    x = 782.24

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1.5x scale

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.