Home / 686,429.10-1,029,643.65-639,773.10

Finding the Fourth Proportional to 686,429.10, 1,029,643.65 and 639,773.10

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Solution

The fourth proportional to 686,429.10, 1,029,643.65 and 639,773.10 is: 959,659.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,429.10 : 1,029,643.65 = 639,773.10 : x
  2. Step 2: Convert to fraction form
    686,429.10/1,029,643.65 = 639,773.10/x
  3. Step 3: Cross multiply
    686,429.10x = 1,029,643.65 × 639,773.10
  4. Step 4: Simplify right side
    686,429.10x = 658,738,309,855.82
  5. Step 5: Solve for x
    x = 658,738,309,855.82/686,429.10
  6. Step 6: Final answer
    x = 959,659.65

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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.