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Finding the Fourth Proportional to 1,886.81, 2,603.85 and 1,047.65

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Solution

The fourth proportional to 1,886.81, 2,603.85 and 1,047.65 is: 1,445.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.81 : 2,603.85 = 1,047.65 : x
  2. Step 2: Convert to fraction form
    1,886.81/2,603.85 = 1,047.65/x
  3. Step 3: Cross multiply
    1,886.81x = 2,603.85 × 1,047.65
  4. Step 4: Simplify right side
    1,886.81x = 2,727,921.15
  5. Step 5: Solve for x
    x = 2,727,921.15/1,886.81
  6. Step 6: Final answer
    x = 1,445.78

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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.