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Finding the Fourth Proportional to 1,580.56, 2,181.12 and 951.64

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Solution

The fourth proportional to 1,580.56, 2,181.12 and 951.64 is: 1,313.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.56 : 2,181.12 = 951.64 : x
  2. Step 2: Convert to fraction form
    1,580.56/2,181.12 = 951.64/x
  3. Step 3: Cross multiply
    1,580.56x = 2,181.12 × 951.64
  4. Step 4: Simplify right side
    1,580.56x = 2,075,641.04
  5. Step 5: Solve for x
    x = 2,075,641.04/1,580.56
  6. Step 6: Final answer
    x = 1,313.23

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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.