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Finding the Fourth Proportional to 836.08, 1,153.53 and 486.70

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Solution

The fourth proportional to 836.08, 1,153.53 and 486.70 is: 671.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.08 : 1,153.53 = 486.70 : x
  2. Step 2: Convert to fraction form
    836.08/1,153.53 = 486.70/x
  3. Step 3: Cross multiply
    836.08x = 1,153.53 × 486.70
  4. Step 4: Simplify right side
    836.08x = 561,423.05
  5. Step 5: Solve for x
    x = 561,423.05/836.08
  6. Step 6: Final answer
    x = 671.49

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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.