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Finding the Fourth Proportional to 741.77, 1,023.72 and 427.13

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Solution

The fourth proportional to 741.77, 1,023.72 and 427.13 is: 589.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.77 : 1,023.72 = 427.13 : x
  2. Step 2: Convert to fraction form
    741.77/1,023.72 = 427.13/x
  3. Step 3: Cross multiply
    741.77x = 1,023.72 × 427.13
  4. Step 4: Simplify right side
    741.77x = 437,261.52
  5. Step 5: Solve for x
    x = 437,261.52/741.77
  6. Step 6: Final answer
    x = 589.48

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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.