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Finding the Fourth Proportional to 1,559.54, 2,153.85 and 971.48

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Solution

The fourth proportional to 1,559.54, 2,153.85 and 971.48 is: 1,341.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559.54 : 2,153.85 = 971.48 : x
  2. Step 2: Convert to fraction form
    1,559.54/2,153.85 = 971.48/x
  3. Step 3: Cross multiply
    1,559.54x = 2,153.85 × 971.48
  4. Step 4: Simplify right side
    1,559.54x = 2,092,422.20
  5. Step 5: Solve for x
    x = 2,092,422.20/1,559.54
  6. Step 6: Final answer
    x = 1,341.69

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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.