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Finding the Fourth Proportional to 519,681.30, 779,813.55 and 220,110.90

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Solution

The fourth proportional to 519,681.30, 779,813.55 and 220,110.90 is: 330,289.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,681.30 : 779,813.55 = 220,110.90 : x
  2. Step 2: Convert to fraction form
    519,681.30/779,813.55 = 220,110.90/x
  3. Step 3: Cross multiply
    519,681.30x = 779,813.55 × 220,110.90
  4. Step 4: Simplify right side
    519,681.30x = 171,645,462,322.70
  5. Step 5: Solve for x
    x = 171,645,462,322.70/519,681.30
  6. Step 6: Final answer
    x = 330,289.86

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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.