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Finding the Fourth Proportional to 914.00, 1,261.28 and 521.01

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Solution

The fourth proportional to 914.00, 1,261.28 and 521.01 is: 718.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.00 : 1,261.28 = 521.01 : x
  2. Step 2: Convert to fraction form
    914.00/1,261.28 = 521.01/x
  3. Step 3: Cross multiply
    914.00x = 1,261.28 × 521.01
  4. Step 4: Simplify right side
    914.00x = 657,136.89
  5. Step 5: Solve for x
    x = 657,136.89/914.00
  6. Step 6: Final answer
    x = 718.97

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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.