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Finding the Fourth Proportional to 423,805.07, 635,637.74 and 139,499.33

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Solution

The fourth proportional to 423,805.07, 635,637.74 and 139,499.33 is: 209,225.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,805.07 : 635,637.74 = 139,499.33 : x
  2. Step 2: Convert to fraction form
    423,805.07/635,637.74 = 139,499.33/x
  3. Step 3: Cross multiply
    423,805.07x = 635,637.74 × 139,499.33
  4. Step 4: Simplify right side
    423,805.07x = 88,671,034,977.03
  5. Step 5: Solve for x
    x = 88,671,034,977.03/423,805.07
  6. Step 6: Final answer
    x = 209,225.99

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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.