Home / 686,563.40-1,030,136.70-331,394.60

Finding the Fourth Proportional to 686,563.40, 1,030,136.70 and 331,394.60

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Solution

The fourth proportional to 686,563.40, 1,030,136.70 and 331,394.60 is: 497,232.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,563.40 : 1,030,136.70 = 331,394.60 : x
  2. Step 2: Convert to fraction form
    686,563.40/1,030,136.70 = 331,394.60/x
  3. Step 3: Cross multiply
    686,563.40x = 1,030,136.70 × 331,394.60
  4. Step 4: Simplify right side
    686,563.40x = 341,381,739,641.82
  5. Step 5: Solve for x
    x = 341,381,739,641.82/686,563.40
  6. Step 6: Final answer
    x = 497,232.65

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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.