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Finding the Fourth Proportional to 515,920.80, 772,844.40 and 347,959.20

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Solution

The fourth proportional to 515,920.80, 772,844.40 and 347,959.20 is: 521,239.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,920.80 : 772,844.40 = 347,959.20 : x
  2. Step 2: Convert to fraction form
    515,920.80/772,844.40 = 347,959.20/x
  3. Step 3: Cross multiply
    515,920.80x = 772,844.40 × 347,959.20
  4. Step 4: Simplify right side
    515,920.80x = 268,918,319,148.48
  5. Step 5: Solve for x
    x = 268,918,319,148.48/515,920.80
  6. Step 6: Final answer
    x = 521,239.54

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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.