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Finding the Fourth Proportional to 619,456.80, 931,258.80 and 528,218.40

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Solution

The fourth proportional to 619,456.80, 931,258.80 and 528,218.40 is: 794,095.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,456.80 : 931,258.80 = 528,218.40 : x
  2. Step 2: Convert to fraction form
    619,456.80/931,258.80 = 528,218.40/x
  3. Step 3: Cross multiply
    619,456.80x = 931,258.80 × 528,218.40
  4. Step 4: Simplify right side
    619,456.80x = 491,908,033,321.92
  5. Step 5: Solve for x
    x = 491,908,033,321.92/619,456.80
  6. Step 6: Final answer
    x = 794,095.78

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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.