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Finding the Fourth Proportional to 425,857.18, 638,786.04 and 238,999.90

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Solution

The fourth proportional to 425,857.18, 638,786.04 and 238,999.90 is: 358,500.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,857.18 : 638,786.04 = 238,999.90 : x
  2. Step 2: Convert to fraction form
    425,857.18/638,786.04 = 238,999.90/x
  3. Step 3: Cross multiply
    425,857.18x = 638,786.04 × 238,999.90
  4. Step 4: Simplify right side
    425,857.18x = 152,669,799,681.40
  5. Step 5: Solve for x
    x = 152,669,799,681.40/425,857.18
  6. Step 6: Final answer
    x = 358,500.00

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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.