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Finding the Fourth Proportional to 777.02, 1,072.05 and 462.12

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Solution

The fourth proportional to 777.02, 1,072.05 and 462.12 is: 637.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.02 : 1,072.05 = 462.12 : x
  2. Step 2: Convert to fraction form
    777.02/1,072.05 = 462.12/x
  3. Step 3: Cross multiply
    777.02x = 1,072.05 × 462.12
  4. Step 4: Simplify right side
    777.02x = 495,415.75
  5. Step 5: Solve for x
    x = 495,415.75/777.02
  6. Step 6: Final answer
    x = 637.59

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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.