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Finding the Fourth Proportional to 528,080.80, 792,121.20 and 509,418.40

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Solution

The fourth proportional to 528,080.80, 792,121.20 and 509,418.40 is: 764,127.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,080.80 : 792,121.20 = 509,418.40 : x
  2. Step 2: Convert to fraction form
    528,080.80/792,121.20 = 509,418.40/x
  3. Step 3: Cross multiply
    528,080.80x = 792,121.20 × 509,418.40
  4. Step 4: Simplify right side
    528,080.80x = 403,521,114,310.08
  5. Step 5: Solve for x
    x = 403,521,114,310.08/528,080.80
  6. Step 6: Final answer
    x = 764,127.60

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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.