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Finding the Fourth Proportional to 733.81, 1,012.74 and 485.64

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Solution

The fourth proportional to 733.81, 1,012.74 and 485.64 is: 670.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.81 : 1,012.74 = 485.64 : x
  2. Step 2: Convert to fraction form
    733.81/1,012.74 = 485.64/x
  3. Step 3: Cross multiply
    733.81x = 1,012.74 × 485.64
  4. Step 4: Simplify right side
    733.81x = 491,827.05
  5. Step 5: Solve for x
    x = 491,827.05/733.81
  6. Step 6: Final answer
    x = 670.24

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1.5x scale

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.