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Finding the Fourth Proportional to 835.44, 1,152.88 and 486.16

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Solution

The fourth proportional to 835.44, 1,152.88 and 486.16 is: 670.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.44 : 1,152.88 = 486.16 : x
  2. Step 2: Convert to fraction form
    835.44/1,152.88 = 486.16/x
  3. Step 3: Cross multiply
    835.44x = 1,152.88 × 486.16
  4. Step 4: Simplify right side
    835.44x = 560,484.14
  5. Step 5: Solve for x
    x = 560,484.14/835.44
  6. Step 6: Final answer
    x = 670.88

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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.