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Finding the Fourth Proportional to 519,656.20, 778,901.10 and 220,085.80

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Solution

The fourth proportional to 519,656.20, 778,901.10 and 220,085.80 is: 329,881.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,656.20 : 778,901.10 = 220,085.80 : x
  2. Step 2: Convert to fraction form
    519,656.20/778,901.10 = 220,085.80/x
  3. Step 3: Cross multiply
    519,656.20x = 778,901.10 × 220,085.80
  4. Step 4: Simplify right side
    519,656.20x = 171,425,071,714.38
  5. Step 5: Solve for x
    x = 171,425,071,714.38/519,656.20
  6. Step 6: Final answer
    x = 329,881.70

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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.