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Finding the Fourth Proportional to 425,674.40, 638,511.60 and 248,381.60

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Solution

The fourth proportional to 425,674.40, 638,511.60 and 248,381.60 is: 372,572.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,674.40 : 638,511.60 = 248,381.60 : x
  2. Step 2: Convert to fraction form
    425,674.40/638,511.60 = 248,381.60/x
  3. Step 3: Cross multiply
    425,674.40x = 638,511.60 × 248,381.60
  4. Step 4: Simplify right side
    425,674.40x = 158,594,532,826.56
  5. Step 5: Solve for x
    x = 158,594,532,826.56/425,674.40
  6. Step 6: Final answer
    x = 372,572.40

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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.