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Finding the Fourth Proportional to 423,021.60, 635,223.60 and 283,399.20

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Solution

The fourth proportional to 423,021.60, 635,223.60 and 283,399.20 is: 425,561.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,021.60 : 635,223.60 = 283,399.20 : x
  2. Step 2: Convert to fraction form
    423,021.60/635,223.60 = 283,399.20/x
  3. Step 3: Cross multiply
    423,021.60x = 635,223.60 × 283,399.20
  4. Step 4: Simplify right side
    423,021.60x = 180,021,860,061.12
  5. Step 5: Solve for x
    x = 180,021,860,061.12/423,021.60
  6. Step 6: Final answer
    x = 425,561.86

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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.