Home / 831,355.86-1,147,270.59-449,382.64

Finding the Fourth Proportional to 831,355.86, 1,147,270.59 and 449,382.64

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Solution

The fourth proportional to 831,355.86, 1,147,270.59 and 449,382.64 is: 620,147.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,355.86 : 1,147,270.59 = 449,382.64 : x
  2. Step 2: Convert to fraction form
    831,355.86/1,147,270.59 = 449,382.64/x
  3. Step 3: Cross multiply
    831,355.86x = 1,147,270.59 × 449,382.64
  4. Step 4: Simplify right side
    831,355.86x = 515,563,486,528.56
  5. Step 5: Solve for x
    x = 515,563,486,528.56/831,355.86
  6. Step 6: Final answer
    x = 620,147.77

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.