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Finding the Fourth Proportional to 914.53, 1,261.65 and 565.42

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Solution

The fourth proportional to 914.53, 1,261.65 and 565.42 is: 780.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.53 : 1,261.65 = 565.42 : x
  2. Step 2: Convert to fraction form
    914.53/1,261.65 = 565.42/x
  3. Step 3: Cross multiply
    914.53x = 1,261.65 × 565.42
  4. Step 4: Simplify right side
    914.53x = 713,362.14
  5. Step 5: Solve for x
    x = 713,362.14/914.53
  6. Step 6: Final answer
    x = 780.03

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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.