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Finding the Fourth Proportional to 425,784, 638,676 and 238,810.08

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Solution

The fourth proportional to 425,784, 638,676 and 238,810.08 is: 358,215.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,784 : 638,676 = 238,810.08 : x
  2. Step 2: Convert to fraction form
    425,784/638,676 = 238,810.08/x
  3. Step 3: Cross multiply
    425,784x = 638,676 × 238,810.08
  4. Step 4: Simplify right side
    425,784x = 152,522,266,654.08
  5. Step 5: Solve for x
    x = 152,522,266,654.08/425,784
  6. Step 6: Final answer
    x = 358,215.12

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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.