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Finding the Fourth Proportional to 835.56, 1,152.32 and 687.32

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Solution

The fourth proportional to 835.56, 1,152.32 and 687.32 is: 947.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.56 : 1,152.32 = 687.32 : x
  2. Step 2: Convert to fraction form
    835.56/1,152.32 = 687.32/x
  3. Step 3: Cross multiply
    835.56x = 1,152.32 × 687.32
  4. Step 4: Simplify right side
    835.56x = 792,012.58
  5. Step 5: Solve for x
    x = 792,012.58/835.56
  6. Step 6: Final answer
    x = 947.88

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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.