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Finding the Fourth Proportional to 2,070.70, 3,106.05 and 609.86

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Solution

The fourth proportional to 2,070.70, 3,106.05 and 609.86 is: 914.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,070.70 : 3,106.05 = 609.86 : x
  2. Step 2: Convert to fraction form
    2,070.70/3,106.05 = 609.86/x
  3. Step 3: Cross multiply
    2,070.70x = 3,106.05 × 609.86
  4. Step 4: Simplify right side
    2,070.70x = 1,894,261.13
  5. Step 5: Solve for x
    x = 1,894,261.13/2,070.70
  6. Step 6: Final answer
    x = 914.79

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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.