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Finding the Fourth Proportional to 425,431.80, 638,147.70 and 366,334.20

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Solution

The fourth proportional to 425,431.80, 638,147.70 and 366,334.20 is: 549,501.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,431.80 : 638,147.70 = 366,334.20 : x
  2. Step 2: Convert to fraction form
    425,431.80/638,147.70 = 366,334.20/x
  3. Step 3: Cross multiply
    425,431.80x = 638,147.70 × 366,334.20
  4. Step 4: Simplify right side
    425,431.80x = 233,775,327,161.34
  5. Step 5: Solve for x
    x = 233,775,327,161.34/425,431.80
  6. Step 6: Final answer
    x = 549,501.30

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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.