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Finding the Fourth Proportional to 766.02, 1,056.84 and 486.18

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Solution

The fourth proportional to 766.02, 1,056.84 and 486.18 is: 670.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.02 : 1,056.84 = 486.18 : x
  2. Step 2: Convert to fraction form
    766.02/1,056.84 = 486.18/x
  3. Step 3: Cross multiply
    766.02x = 1,056.84 × 486.18
  4. Step 4: Simplify right side
    766.02x = 513,814.47
  5. Step 5: Solve for x
    x = 513,814.47/766.02
  6. Step 6: Final answer
    x = 670.76

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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.