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Finding the Fourth Proportional to 496,870.56, 686,136.48 and 315,640.80

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Solution

The fourth proportional to 496,870.56, 686,136.48 and 315,640.80 is: 435,873.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,870.56 : 686,136.48 = 315,640.80 : x
  2. Step 2: Convert to fraction form
    496,870.56/686,136.48 = 315,640.80/x
  3. Step 3: Cross multiply
    496,870.56x = 686,136.48 × 315,640.80
  4. Step 4: Simplify right side
    496,870.56x = 216,572,667,456.38
  5. Step 5: Solve for x
    x = 216,572,667,456.38/496,870.56
  6. Step 6: Final answer
    x = 435,873.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.