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Finding the Fourth Proportional to 521,700.80, 783,134.40 and 403,894.40

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Solution

The fourth proportional to 521,700.80, 783,134.40 and 403,894.40 is: 606,293.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,700.80 : 783,134.40 = 403,894.40 : x
  2. Step 2: Convert to fraction form
    521,700.80/783,134.40 = 403,894.40/x
  3. Step 3: Cross multiply
    521,700.80x = 783,134.40 × 403,894.40
  4. Step 4: Simplify right side
    521,700.80x = 316,303,598,607.36
  5. Step 5: Solve for x
    x = 316,303,598,607.36/521,700.80
  6. Step 6: Final answer
    x = 606,293.11

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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.