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Finding the Fourth Proportional to 289,003.20, 433,447.20 and 139,243.20

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Solution

The fourth proportional to 289,003.20, 433,447.20 and 139,243.20 is: 208,837.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,003.20 : 433,447.20 = 139,243.20 : x
  2. Step 2: Convert to fraction form
    289,003.20/433,447.20 = 139,243.20/x
  3. Step 3: Cross multiply
    289,003.20x = 433,447.20 × 139,243.20
  4. Step 4: Simplify right side
    289,003.20x = 60,354,575,159.04
  5. Step 5: Solve for x
    x = 60,354,575,159.04/289,003.20
  6. Step 6: Final answer
    x = 208,837.05

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1.5x scale

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.