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Finding the Fourth Proportional to 1,861.74, 2,792.61 and 807.66

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Solution

The fourth proportional to 1,861.74, 2,792.61 and 807.66 is: 1,211.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.74 : 2,792.61 = 807.66 : x
  2. Step 2: Convert to fraction form
    1,861.74/2,792.61 = 807.66/x
  3. Step 3: Cross multiply
    1,861.74x = 2,792.61 × 807.66
  4. Step 4: Simplify right side
    1,861.74x = 2,255,479.39
  5. Step 5: Solve for x
    x = 2,255,479.39/1,861.74
  6. Step 6: Final answer
    x = 1,211.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.