Home / 813,612.40-1,220,199.90-340,199.80

Finding the Fourth Proportional to 813,612.40, 1,220,199.90 and 340,199.80

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Solution

The fourth proportional to 813,612.40, 1,220,199.90 and 340,199.80 is: 510,208.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,612.40 : 1,220,199.90 = 340,199.80 : x
  2. Step 2: Convert to fraction form
    813,612.40/1,220,199.90 = 340,199.80/x
  3. Step 3: Cross multiply
    813,612.40x = 1,220,199.90 × 340,199.80
  4. Step 4: Simplify right side
    813,612.40x = 415,111,761,940.02
  5. Step 5: Solve for x
    x = 415,111,761,940.02/813,612.40
  6. Step 6: Final answer
    x = 510,208.25

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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.