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Finding the Fourth Proportional to 619,994.79, 855,686.19 and 378,417.74

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Solution

The fourth proportional to 619,994.79, 855,686.19 and 378,417.74 is: 522,273.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,994.79 : 855,686.19 = 378,417.74 : x
  2. Step 2: Convert to fraction form
    619,994.79/855,686.19 = 378,417.74/x
  3. Step 3: Cross multiply
    619,994.79x = 855,686.19 × 378,417.74
  4. Step 4: Simplify right side
    619,994.79x = 323,806,834,086.95
  5. Step 5: Solve for x
    x = 323,806,834,086.95/619,994.79
  6. Step 6: Final answer
    x = 522,273.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.