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Finding the Fourth Proportional to 611,852.40, 917,778.60 and 521,310.60

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Solution

The fourth proportional to 611,852.40, 917,778.60 and 521,310.60 is: 781,965.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,852.40 : 917,778.60 = 521,310.60 : x
  2. Step 2: Convert to fraction form
    611,852.40/917,778.60 = 521,310.60/x
  3. Step 3: Cross multiply
    611,852.40x = 917,778.60 × 521,310.60
  4. Step 4: Simplify right side
    611,852.40x = 478,447,712,633.16
  5. Step 5: Solve for x
    x = 478,447,712,633.16/611,852.40
  6. Step 6: Final answer
    x = 781,965.90

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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.