Home / 686,015.10-1,029,022.65-212,748.30

Finding the Fourth Proportional to 686,015.10, 1,029,022.65 and 212,748.30

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Solution

The fourth proportional to 686,015.10, 1,029,022.65 and 212,748.30 is: 319,122.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,015.10 : 1,029,022.65 = 212,748.30 : x
  2. Step 2: Convert to fraction form
    686,015.10/1,029,022.65 = 212,748.30/x
  3. Step 3: Cross multiply
    686,015.10x = 1,029,022.65 × 212,748.30
  4. Step 4: Simplify right side
    686,015.10x = 218,922,819,449.00
  5. Step 5: Solve for x
    x = 218,922,819,449.00/686,015.10
  6. Step 6: Final answer
    x = 319,122.45

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Double scale
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Similar ratio
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1.5x scale

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.