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Finding the Fourth Proportional to 425,782, 638,673 and 238,808.08

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Solution

The fourth proportional to 425,782, 638,673 and 238,808.08 is: 358,212.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,782 : 638,673 = 238,808.08 : x
  2. Step 2: Convert to fraction form
    425,782/638,673 = 238,808.08/x
  3. Step 3: Cross multiply
    425,782x = 638,673 × 238,808.08
  4. Step 4: Simplify right side
    425,782x = 152,520,272,877.84
  5. Step 5: Solve for x
    x = 152,520,272,877.84/425,782
  6. Step 6: Final answer
    x = 358,212.12

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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.