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Finding the Fourth Proportional to 520,044.90, 778,755.15 and 415,068.90

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Solution

The fourth proportional to 520,044.90, 778,755.15 and 415,068.90 is: 621,556.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,044.90 : 778,755.15 = 415,068.90 : x
  2. Step 2: Convert to fraction form
    520,044.90/778,755.15 = 415,068.90/x
  3. Step 3: Cross multiply
    520,044.90x = 778,755.15 × 415,068.90
  4. Step 4: Simplify right side
    520,044.90x = 323,237,043,479.84
  5. Step 5: Solve for x
    x = 323,237,043,479.84/520,044.90
  6. Step 6: Final answer
    x = 621,556.03

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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.