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Finding the Fourth Proportional to 425,918.13, 638,690.08 and 159,491.76

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Solution

The fourth proportional to 425,918.13, 638,690.08 and 159,491.76 is: 239,167.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,918.13 : 638,690.08 = 159,491.76 : x
  2. Step 2: Convert to fraction form
    425,918.13/638,690.08 = 159,491.76/x
  3. Step 3: Cross multiply
    425,918.13x = 638,690.08 × 159,491.76
  4. Step 4: Simplify right side
    425,918.13x = 101,865,804,953.74
  5. Step 5: Solve for x
    x = 101,865,804,953.74/425,918.13
  6. Step 6: Final answer
    x = 239,167.57

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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.