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Finding the Fourth Proportional to 660,469.30, 990,391.65 and 255,851.01

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Solution

The fourth proportional to 660,469.30, 990,391.65 and 255,851.01 is: 383,655.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,469.30 : 990,391.65 = 255,851.01 : x
  2. Step 2: Convert to fraction form
    660,469.30/990,391.65 = 255,851.01/x
  3. Step 3: Cross multiply
    660,469.30x = 990,391.65 × 255,851.01
  4. Step 4: Simplify right side
    660,469.30x = 253,392,703,948.07
  5. Step 5: Solve for x
    x = 253,392,703,948.07/660,469.30
  6. Step 6: Final answer
    x = 383,655.54

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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.