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Finding the Fourth Proportional to 835.94, 1,153.76 and 486.69

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Solution

The fourth proportional to 835.94, 1,153.76 and 486.69 is: 671.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.94 : 1,153.76 = 486.69 : x
  2. Step 2: Convert to fraction form
    835.94/1,153.76 = 486.69/x
  3. Step 3: Cross multiply
    835.94x = 1,153.76 × 486.69
  4. Step 4: Simplify right side
    835.94x = 561,521.02
  5. Step 5: Solve for x
    x = 561,521.02/835.94
  6. Step 6: Final answer
    x = 671.73

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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.