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Finding the Fourth Proportional to 521,253.84, 781,558.20 and 354,536.40

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Solution

The fourth proportional to 521,253.84, 781,558.20 and 354,536.40 is: 531,585.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,253.84 : 781,558.20 = 354,536.40 : x
  2. Step 2: Convert to fraction form
    521,253.84/781,558.20 = 354,536.40/x
  3. Step 3: Cross multiply
    521,253.84x = 781,558.20 × 354,536.40
  4. Step 4: Simplify right side
    521,253.84x = 277,090,830,618.48
  5. Step 5: Solve for x
    x = 277,090,830,618.48/521,253.84
  6. Step 6: Final answer
    x = 531,585.21

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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.