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Finding the Fourth Proportional to 351,782.40, 528,062.40 and 218,812.80

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Solution

The fourth proportional to 351,782.40, 528,062.40 and 218,812.80 is: 328,461.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,782.40 : 528,062.40 = 218,812.80 : x
  2. Step 2: Convert to fraction form
    351,782.40/528,062.40 = 218,812.80/x
  3. Step 3: Cross multiply
    351,782.40x = 528,062.40 × 218,812.80
  4. Step 4: Simplify right side
    351,782.40x = 115,546,812,318.72
  5. Step 5: Solve for x
    x = 115,546,812,318.72/351,782.40
  6. Step 6: Final answer
    x = 328,461.04

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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.