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Finding the Fourth Proportional to 1,875.73, 2,814.40 and 780.34

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Solution

The fourth proportional to 1,875.73, 2,814.40 and 780.34 is: 1,170.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.73 : 2,814.40 = 780.34 : x
  2. Step 2: Convert to fraction form
    1,875.73/2,814.40 = 780.34/x
  3. Step 3: Cross multiply
    1,875.73x = 2,814.40 × 780.34
  4. Step 4: Simplify right side
    1,875.73x = 2,196,188.90
  5. Step 5: Solve for x
    x = 2,196,188.90/1,875.73
  6. Step 6: Final answer
    x = 1,170.84

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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.