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Finding the Fourth Proportional to 1,854.62, 2,780.45 and 929.67

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Solution

The fourth proportional to 1,854.62, 2,780.45 and 929.67 is: 1,393.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,854.62 : 2,780.45 = 929.67 : x
  2. Step 2: Convert to fraction form
    1,854.62/2,780.45 = 929.67/x
  3. Step 3: Cross multiply
    1,854.62x = 2,780.45 × 929.67
  4. Step 4: Simplify right side
    1,854.62x = 2,584,896.30
  5. Step 5: Solve for x
    x = 2,584,896.30/1,854.62
  6. Step 6: Final answer
    x = 1,393.76

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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.