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Finding the Fourth Proportional to 423,083.70, 634,625.55 and 403,400.70

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Solution

The fourth proportional to 423,083.70, 634,625.55 and 403,400.70 is: 605,101.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,083.70 : 634,625.55 = 403,400.70 : x
  2. Step 2: Convert to fraction form
    423,083.70/634,625.55 = 403,400.70/x
  3. Step 3: Cross multiply
    423,083.70x = 634,625.55 × 403,400.70
  4. Step 4: Simplify right side
    423,083.70x = 256,008,391,107.89
  5. Step 5: Solve for x
    x = 256,008,391,107.89/423,083.70
  6. Step 6: Final answer
    x = 605,101.05

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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.