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Finding the Fourth Proportional to 1,877.84, 2,817.17 and 561.70

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Solution

The fourth proportional to 1,877.84, 2,817.17 and 561.70 is: 842.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.84 : 2,817.17 = 561.70 : x
  2. Step 2: Convert to fraction form
    1,877.84/2,817.17 = 561.70/x
  3. Step 3: Cross multiply
    1,877.84x = 2,817.17 × 561.70
  4. Step 4: Simplify right side
    1,877.84x = 1,582,404.39
  5. Step 5: Solve for x
    x = 1,582,404.39/1,877.84
  6. Step 6: Final answer
    x = 842.67

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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.