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Finding the Fourth Proportional to 914.02, 1,261.34 and 521.04

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Solution

The fourth proportional to 914.02, 1,261.34 and 521.04 is: 719.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.02 : 1,261.34 = 521.04 : x
  2. Step 2: Convert to fraction form
    914.02/1,261.34 = 521.04/x
  3. Step 3: Cross multiply
    914.02x = 1,261.34 × 521.04
  4. Step 4: Simplify right side
    914.02x = 657,199.68
  5. Step 5: Solve for x
    x = 657,199.68/914.02
  6. Step 6: Final answer
    x = 719.03

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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.