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Finding the Fourth Proportional to 835.72, 1,153.20 and 486.32

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Solution

The fourth proportional to 835.72, 1,153.20 and 486.32 is: 671.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.72 : 1,153.20 = 486.32 : x
  2. Step 2: Convert to fraction form
    835.72/1,153.20 = 486.32/x
  3. Step 3: Cross multiply
    835.72x = 1,153.20 × 486.32
  4. Step 4: Simplify right side
    835.72x = 560,824.22
  5. Step 5: Solve for x
    x = 560,824.22/835.72
  6. Step 6: Final answer
    x = 671.07

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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.