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Finding the Fourth Proportional to 1,854.76, 2,780.82 and 929.64

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Solution

The fourth proportional to 1,854.76, 2,780.82 and 929.64 is: 1,393.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,854.76 : 2,780.82 = 929.64 : x
  2. Step 2: Convert to fraction form
    1,854.76/2,780.82 = 929.64/x
  3. Step 3: Cross multiply
    1,854.76x = 2,780.82 × 929.64
  4. Step 4: Simplify right side
    1,854.76x = 2,585,161.50
  5. Step 5: Solve for x
    x = 2,585,161.50/1,854.76
  6. Step 6: Final answer
    x = 1,393.80

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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.