Home / 686,254.20-1,029,381.30-509,107.20

Finding the Fourth Proportional to 686,254.20, 1,029,381.30 and 509,107.20

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Solution

The fourth proportional to 686,254.20, 1,029,381.30 and 509,107.20 is: 763,660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,254.20 : 1,029,381.30 = 509,107.20 : x
  2. Step 2: Convert to fraction form
    686,254.20/1,029,381.30 = 509,107.20/x
  3. Step 3: Cross multiply
    686,254.20x = 1,029,381.30 × 509,107.20
  4. Step 4: Simplify right side
    686,254.20x = 524,065,431,375.36
  5. Step 5: Solve for x
    x = 524,065,431,375.36/686,254.20
  6. Step 6: Final answer
    x = 763,660.80

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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.