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Finding the Fourth Proportional to 907,646,176.20, 1,361,469,264.30 and 778,506,013.20

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Solution

The fourth proportional to 907,646,176.20, 1,361,469,264.30 and 778,506,013.20 is: 1,167,759,019.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,646,176.20 : 1,361,469,264.30 = 778,506,013.20 : x
  2. Step 2: Convert to fraction form
    907,646,176.20/1,361,469,264.30 = 778,506,013.20/x
  3. Step 3: Cross multiply
    907,646,176.20x = 1,361,469,264.30 × 778,506,013.20
  4. Step 4: Simplify right side
    907,646,176.20x = 1,059,912,009,044,530,176
  5. Step 5: Solve for x
    x = 1,059,912,009,044,530,176/907,646,176.20
  6. Step 6: Final answer
    x = 1,167,759,019.80

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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.