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Finding the Fourth Proportional to 660,469.80, 990,392.40 and 255,851.51

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Solution

The fourth proportional to 660,469.80, 990,392.40 and 255,851.51 is: 383,656.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,469.80 : 990,392.40 = 255,851.51 : x
  2. Step 2: Convert to fraction form
    660,469.80/990,392.40 = 255,851.51/x
  3. Step 3: Cross multiply
    660,469.80x = 990,392.40 × 255,851.51
  4. Step 4: Simplify right side
    660,469.80x = 253,393,391,032.52
  5. Step 5: Solve for x
    x = 253,393,391,032.52/660,469.80
  6. Step 6: Final answer
    x = 383,656.29

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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.