Home / 726,343.90-1,089,515.85-411,415.90

Finding the Fourth Proportional to 726,343.90, 1,089,515.85 and 411,415.90

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Solution

The fourth proportional to 726,343.90, 1,089,515.85 and 411,415.90 is: 617,123.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,343.90 : 1,089,515.85 = 411,415.90 : x
  2. Step 2: Convert to fraction form
    726,343.90/1,089,515.85 = 411,415.90/x
  3. Step 3: Cross multiply
    726,343.90x = 1,089,515.85 × 411,415.90
  4. Step 4: Simplify right side
    726,343.90x = 448,244,143,992.02
  5. Step 5: Solve for x
    x = 448,244,143,992.02/726,343.90
  6. Step 6: Final answer
    x = 617,123.85

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Double scale
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Similar ratio
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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.