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Finding the Fourth Proportional to 835.08, 1,152.56 and 485.88

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Solution

The fourth proportional to 835.08, 1,152.56 and 485.88 is: 670.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.08 : 1,152.56 = 485.88 : x
  2. Step 2: Convert to fraction form
    835.08/1,152.56 = 485.88/x
  3. Step 3: Cross multiply
    835.08x = 1,152.56 × 485.88
  4. Step 4: Simplify right side
    835.08x = 560,005.85
  5. Step 5: Solve for x
    x = 560,005.85/835.08
  6. Step 6: Final answer
    x = 670.60

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Double scale
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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.