Home / 813,404.60-1,220,106.90-252,495.80

Finding the Fourth Proportional to 813,404.60, 1,220,106.90 and 252,495.80

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Solution

The fourth proportional to 813,404.60, 1,220,106.90 and 252,495.80 is: 378,743.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,404.60 : 1,220,106.90 = 252,495.80 : x
  2. Step 2: Convert to fraction form
    813,404.60/1,220,106.90 = 252,495.80/x
  3. Step 3: Cross multiply
    813,404.60x = 1,220,106.90 × 252,495.80
  4. Step 4: Simplify right side
    813,404.60x = 308,071,867,801.02
  5. Step 5: Solve for x
    x = 308,071,867,801.02/813,404.60
  6. Step 6: Final answer
    x = 378,743.70

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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.