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Finding the Fourth Proportional to 425,855.68, 638,783.79 and 238,998.40

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Solution

The fourth proportional to 425,855.68, 638,783.79 and 238,998.40 is: 358,497.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,855.68 : 638,783.79 = 238,998.40 : x
  2. Step 2: Convert to fraction form
    425,855.68/638,783.79 = 238,998.40/x
  3. Step 3: Cross multiply
    425,855.68x = 638,783.79 × 238,998.40
  4. Step 4: Simplify right side
    425,855.68x = 152,668,303,755.94
  5. Step 5: Solve for x
    x = 152,668,303,755.94/425,855.68
  6. Step 6: Final answer
    x = 358,497.75

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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.