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Finding the Fourth Proportional to 1,671.74, 2,307.09 and 925.78

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Solution

The fourth proportional to 1,671.74, 2,307.09 and 925.78 is: 1,277.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,671.74 : 2,307.09 = 925.78 : x
  2. Step 2: Convert to fraction form
    1,671.74/2,307.09 = 925.78/x
  3. Step 3: Cross multiply
    1,671.74x = 2,307.09 × 925.78
  4. Step 4: Simplify right side
    1,671.74x = 2,135,855.47
  5. Step 5: Solve for x
    x = 2,135,855.47/1,671.74
  6. Step 6: Final answer
    x = 1,277.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.