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Finding the Fourth Proportional to 611,818.40, 917,727.60 and 521,276.60

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Solution

The fourth proportional to 611,818.40, 917,727.60 and 521,276.60 is: 781,914.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,818.40 : 917,727.60 = 521,276.60 : x
  2. Step 2: Convert to fraction form
    611,818.40/917,727.60 = 521,276.60/x
  3. Step 3: Cross multiply
    611,818.40x = 917,727.60 × 521,276.60
  4. Step 4: Simplify right side
    611,818.40x = 478,389,923,054.16
  5. Step 5: Solve for x
    x = 478,389,923,054.16/611,818.40
  6. Step 6: Final answer
    x = 781,914.90

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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.