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Finding the Fourth Proportional to 777.72, 1,073.34 and 483.24

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Solution

The fourth proportional to 777.72, 1,073.34 and 483.24 is: 666.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.72 : 1,073.34 = 483.24 : x
  2. Step 2: Convert to fraction form
    777.72/1,073.34 = 483.24/x
  3. Step 3: Cross multiply
    777.72x = 1,073.34 × 483.24
  4. Step 4: Simplify right side
    777.72x = 518,680.82
  5. Step 5: Solve for x
    x = 518,680.82/777.72
  6. Step 6: Final answer
    x = 666.92

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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.