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Finding the Fourth Proportional to 520,911.60, 781,405.80 and 188,444.40

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Solution

The fourth proportional to 520,911.60, 781,405.80 and 188,444.40 is: 282,680.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,911.60 : 781,405.80 = 188,444.40 : x
  2. Step 2: Convert to fraction form
    520,911.60/781,405.80 = 188,444.40/x
  3. Step 3: Cross multiply
    520,911.60x = 781,405.80 × 188,444.40
  4. Step 4: Simplify right side
    520,911.60x = 147,251,547,137.52
  5. Step 5: Solve for x
    x = 147,251,547,137.52/520,911.60
  6. Step 6: Final answer
    x = 282,680.49

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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.