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Finding the Fourth Proportional to 835,660.80, 1,254,310.40 and 415,411.20

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Solution

The fourth proportional to 835,660.80, 1,254,310.40 and 415,411.20 is: 623,524.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    835,660.80 : 1,254,310.40 = 415,411.20 : x
  2. Step 2: Convert to fraction form
    835,660.80/1,254,310.40 = 415,411.20/x
  3. Step 3: Cross multiply
    835,660.80x = 1,254,310.40 × 415,411.20
  4. Step 4: Simplify right side
    835,660.80x = 521,054,588,436.48
  5. Step 5: Solve for x
    x = 521,054,588,436.48/835,660.80
  6. Step 6: Final answer
    x = 623,524.03

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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.