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Finding the Fourth Proportional to 619,265.40, 865,921.80 and 619,265.40

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Solution

The fourth proportional to 619,265.40, 865,921.80 and 619,265.40 is: 865,921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,265.40 : 865,921.80 = 619,265.40 : x
  2. Step 2: Convert to fraction form
    619,265.40/865,921.80 = 619,265.40/x
  3. Step 3: Cross multiply
    619,265.40x = 865,921.80 × 619,265.40
  4. Step 4: Simplify right side
    619,265.40x = 536,235,409,845.72
  5. Step 5: Solve for x
    x = 536,235,409,845.72/619,265.40
  6. Step 6: Final answer
    x = 865,921.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.