Home / 831,409.61-1,147,346.95-449,436.39

Finding the Fourth Proportional to 831,409.61, 1,147,346.95 and 449,436.39

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Solution

The fourth proportional to 831,409.61, 1,147,346.95 and 449,436.39 is: 620,223.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,409.61 : 1,147,346.95 = 449,436.39 : x
  2. Step 2: Convert to fraction form
    831,409.61/1,147,346.95 = 449,436.39/x
  3. Step 3: Cross multiply
    831,409.61x = 1,147,346.95 × 449,436.39
  4. Step 4: Simplify right side
    831,409.61x = 515,659,471,285.51
  5. Step 5: Solve for x
    x = 515,659,471,285.51/831,409.61
  6. Step 6: Final answer
    x = 620,223.13

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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.