Home / 813,847.50-1,220,771.25-315,211.50

Finding the Fourth Proportional to 813,847.50, 1,220,771.25 and 315,211.50

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Solution

The fourth proportional to 813,847.50, 1,220,771.25 and 315,211.50 is: 472,817.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,847.50 : 1,220,771.25 = 315,211.50 : x
  2. Step 2: Convert to fraction form
    813,847.50/1,220,771.25 = 315,211.50/x
  3. Step 3: Cross multiply
    813,847.50x = 1,220,771.25 × 315,211.50
  4. Step 4: Simplify right side
    813,847.50x = 384,801,136,869.38
  5. Step 5: Solve for x
    x = 384,801,136,869.38/813,847.50
  6. Step 6: Final answer
    x = 472,817.25

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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.