Home / 831,428.40-1,247,142.60-298,966.80

Finding the Fourth Proportional to 831,428.40, 1,247,142.60 and 298,966.80

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Solution

The fourth proportional to 831,428.40, 1,247,142.60 and 298,966.80 is: 448,450.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,428.40 : 1,247,142.60 = 298,966.80 : x
  2. Step 2: Convert to fraction form
    831,428.40/1,247,142.60 = 298,966.80/x
  3. Step 3: Cross multiply
    831,428.40x = 1,247,142.60 × 298,966.80
  4. Step 4: Simplify right side
    831,428.40x = 372,854,232,265.68
  5. Step 5: Solve for x
    x = 372,854,232,265.68/831,428.40
  6. Step 6: Final answer
    x = 448,450.20

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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.