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Finding the Fourth Proportional to 1,650.64, 2,278.70 and 1,129.40

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Solution

The fourth proportional to 1,650.64, 2,278.70 and 1,129.40 is: 1,559.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,650.64 : 2,278.70 = 1,129.40 : x
  2. Step 2: Convert to fraction form
    1,650.64/2,278.70 = 1,129.40/x
  3. Step 3: Cross multiply
    1,650.64x = 2,278.70 × 1,129.40
  4. Step 4: Simplify right side
    1,650.64x = 2,573,563.78
  5. Step 5: Solve for x
    x = 2,573,563.78/1,650.64
  6. Step 6: Final answer
    x = 1,559.13

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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.