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Finding the Fourth Proportional to 2,384.73, 3,291.10 and 1,390.25

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Solution

The fourth proportional to 2,384.73, 3,291.10 and 1,390.25 is: 1,918.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,384.73 : 3,291.10 = 1,390.25 : x
  2. Step 2: Convert to fraction form
    2,384.73/3,291.10 = 1,390.25/x
  3. Step 3: Cross multiply
    2,384.73x = 3,291.10 × 1,390.25
  4. Step 4: Simplify right side
    2,384.73x = 4,575,456.53
  5. Step 5: Solve for x
    x = 4,575,456.53/2,384.73
  6. Step 6: Final answer
    x = 1,918.65

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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.