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Finding the Fourth Proportional to 637,269.55, 878,984 and 419,408.80

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Solution

The fourth proportional to 637,269.55, 878,984 and 419,408.80 is: 578,489.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,269.55 : 878,984 = 419,408.80 : x
  2. Step 2: Convert to fraction form
    637,269.55/878,984 = 419,408.80/x
  3. Step 3: Cross multiply
    637,269.55x = 878,984 × 419,408.80
  4. Step 4: Simplify right side
    637,269.55x = 368,653,624,659.20
  5. Step 5: Solve for x
    x = 368,653,624,659.20/637,269.55
  6. Step 6: Final answer
    x = 578,489.31

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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.