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Finding the Fourth Proportional to 777.46, 1,164.50 and 487.48

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Solution

The fourth proportional to 777.46, 1,164.50 and 487.48 is: 730.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.46 : 1,164.50 = 487.48 : x
  2. Step 2: Convert to fraction form
    777.46/1,164.50 = 487.48/x
  3. Step 3: Cross multiply
    777.46x = 1,164.50 × 487.48
  4. Step 4: Simplify right side
    777.46x = 567,670.46
  5. Step 5: Solve for x
    x = 567,670.46/777.46
  6. Step 6: Final answer
    x = 730.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.