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Finding the Fourth Proportional to 831,358.40, 1,247,404.80 and 404,657.60

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Solution

The fourth proportional to 831,358.40, 1,247,404.80 and 404,657.60 is: 607,165.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,358.40 : 1,247,404.80 = 404,657.60 : x
  2. Step 2: Convert to fraction form
    831,358.40/1,247,404.80 = 404,657.60/x
  3. Step 3: Cross multiply
    831,358.40x = 1,247,404.80 × 404,657.60
  4. Step 4: Simplify right side
    831,358.40x = 504,771,832,596.48
  5. Step 5: Solve for x
    x = 504,771,832,596.48/831,358.40
  6. Step 6: Final answer
    x = 607,165.13

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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.