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Finding the Fourth Proportional to 504,012.80, 757,145.60 and 421,068.80

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Solution

The fourth proportional to 504,012.80, 757,145.60 and 421,068.80 is: 632,544.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    504,012.80 : 757,145.60 = 421,068.80 : x
  2. Step 2: Convert to fraction form
    504,012.80/757,145.60 = 421,068.80/x
  3. Step 3: Cross multiply
    504,012.80x = 757,145.60 × 421,068.80
  4. Step 4: Simplify right side
    504,012.80x = 318,810,389,217.28
  5. Step 5: Solve for x
    x = 318,810,389,217.28/504,012.80
  6. Step 6: Final answer
    x = 632,544.23

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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.