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Finding the Fourth Proportional to 1,805.78, 2,702.90 and 971.70

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Solution

The fourth proportional to 1,805.78, 2,702.90 and 971.70 is: 1,454.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.78 : 2,702.90 = 971.70 : x
  2. Step 2: Convert to fraction form
    1,805.78/2,702.90 = 971.70/x
  3. Step 3: Cross multiply
    1,805.78x = 2,702.90 × 971.70
  4. Step 4: Simplify right side
    1,805.78x = 2,626,407.93
  5. Step 5: Solve for x
    x = 2,626,407.93/1,805.78
  6. Step 6: Final answer
    x = 1,454.45

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1.5x scale

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.