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Finding the Fourth Proportional to 579,747.20, 809,987.20 and 579,747.20

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Solution

The fourth proportional to 579,747.20, 809,987.20 and 579,747.20 is: 809,987.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,747.20 : 809,987.20 = 579,747.20 : x
  2. Step 2: Convert to fraction form
    579,747.20/809,987.20 = 579,747.20/x
  3. Step 3: Cross multiply
    579,747.20x = 809,987.20 × 579,747.20
  4. Step 4: Simplify right side
    579,747.20x = 469,587,811,235.84
  5. Step 5: Solve for x
    x = 469,587,811,235.84/579,747.20
  6. Step 6: Final answer
    x = 809,987.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.