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Finding the Fourth Proportional to 519,708.80, 779,854.80 and 220,138.40

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Solution

The fourth proportional to 519,708.80, 779,854.80 and 220,138.40 is: 330,331.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,708.80 : 779,854.80 = 220,138.40 : x
  2. Step 2: Convert to fraction form
    519,708.80/779,854.80 = 220,138.40/x
  3. Step 3: Cross multiply
    519,708.80x = 779,854.80 × 220,138.40
  4. Step 4: Simplify right side
    519,708.80x = 171,675,987,904.32
  5. Step 5: Solve for x
    x = 171,675,987,904.32/519,708.80
  6. Step 6: Final answer
    x = 330,331.12

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1.5x scale

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.