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Finding the Fourth Proportional to 1,609.10, 2,219.38 and 1,070.12

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Solution

The fourth proportional to 1,609.10, 2,219.38 and 1,070.12 is: 1,475.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.10 : 2,219.38 = 1,070.12 : x
  2. Step 2: Convert to fraction form
    1,609.10/2,219.38 = 1,070.12/x
  3. Step 3: Cross multiply
    1,609.10x = 2,219.38 × 1,070.12
  4. Step 4: Simplify right side
    1,609.10x = 2,375,002.93
  5. Step 5: Solve for x
    x = 2,375,002.93/1,609.10
  6. Step 6: Final answer
    x = 1,475.98

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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.