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Finding the Fourth Proportional to 439,782.80, 659,285.40 and 262,101.20

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Solution

The fourth proportional to 439,782.80, 659,285.40 and 262,101.20 is: 392,920.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,782.80 : 659,285.40 = 262,101.20 : x
  2. Step 2: Convert to fraction form
    439,782.80/659,285.40 = 262,101.20/x
  3. Step 3: Cross multiply
    439,782.80x = 659,285.40 × 262,101.20
  4. Step 4: Simplify right side
    439,782.80x = 172,799,494,482.48
  5. Step 5: Solve for x
    x = 172,799,494,482.48/439,782.80
  6. Step 6: Final answer
    x = 392,920.08

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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.