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Finding the Fourth Proportional to 351,765.65, 528,354.56 and 209,887.81

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Solution

The fourth proportional to 351,765.65, 528,354.56 and 209,887.81 is: 315,253.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,765.65 : 528,354.56 = 209,887.81 : x
  2. Step 2: Convert to fraction form
    351,765.65/528,354.56 = 209,887.81/x
  3. Step 3: Cross multiply
    351,765.65x = 528,354.56 × 209,887.81
  4. Step 4: Simplify right side
    351,765.65x = 110,895,180,705.75
  5. Step 5: Solve for x
    x = 110,895,180,705.75/351,765.65
  6. Step 6: Final answer
    x = 315,253.01

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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.