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Finding the Fourth Proportional to 837.76, 1,156.39 and 699.47

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Solution

The fourth proportional to 837.76, 1,156.39 and 699.47 is: 965.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.76 : 1,156.39 = 699.47 : x
  2. Step 2: Convert to fraction form
    837.76/1,156.39 = 699.47/x
  3. Step 3: Cross multiply
    837.76x = 1,156.39 × 699.47
  4. Step 4: Simplify right side
    837.76x = 808,860.11
  5. Step 5: Solve for x
    x = 808,860.11/837.76
  6. Step 6: Final answer
    x = 965.50

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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.