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Finding the Fourth Proportional to 500,509.20, 750,811.48 and 140,679.12

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Solution

The fourth proportional to 500,509.20, 750,811.48 and 140,679.12 is: 211,032.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,509.20 : 750,811.48 = 140,679.12 : x
  2. Step 2: Convert to fraction form
    500,509.20/750,811.48 = 140,679.12/x
  3. Step 3: Cross multiply
    500,509.20x = 750,811.48 × 140,679.12
  4. Step 4: Simplify right side
    500,509.20x = 105,623,498,292.30
  5. Step 5: Solve for x
    x = 105,623,498,292.30/500,509.20
  6. Step 6: Final answer
    x = 211,032.08

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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.