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Finding the Fourth Proportional to 315,220.93, 472,780.62 and 90,530.26

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Solution

The fourth proportional to 315,220.93, 472,780.62 and 90,530.26 is: 135,780.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,220.93 : 472,780.62 = 90,530.26 : x
  2. Step 2: Convert to fraction form
    315,220.93/472,780.62 = 90,530.26/x
  3. Step 3: Cross multiply
    315,220.93x = 472,780.62 × 90,530.26
  4. Step 4: Simplify right side
    315,220.93x = 42,800,950,087.66
  5. Step 5: Solve for x
    x = 42,800,950,087.66/315,220.93
  6. Step 6: Final answer
    x = 135,780.80

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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.