Home / 1,665.41-2,299.14-1,291.55

Finding the Fourth Proportional to 1,665.41, 2,299.14 and 1,291.55

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Solution

The fourth proportional to 1,665.41, 2,299.14 and 1,291.55 is: 1,783.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.41 : 2,299.14 = 1,291.55 : x
  2. Step 2: Convert to fraction form
    1,665.41/2,299.14 = 1,291.55/x
  3. Step 3: Cross multiply
    1,665.41x = 2,299.14 × 1,291.55
  4. Step 4: Simplify right side
    1,665.41x = 2,969,442.77
  5. Step 5: Solve for x
    x = 2,969,442.77/1,665.41
  6. Step 6: Final answer
    x = 1,783.02

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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.