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Finding the Fourth Proportional to 615,111.60, 920,593.80 and 565,345.20

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Solution

The fourth proportional to 615,111.60, 920,593.80 and 565,345.20 is: 846,111.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,111.60 : 920,593.80 = 565,345.20 : x
  2. Step 2: Convert to fraction form
    615,111.60/920,593.80 = 565,345.20/x
  3. Step 3: Cross multiply
    615,111.60x = 920,593.80 × 565,345.20
  4. Step 4: Simplify right side
    615,111.60x = 520,453,285,979.76
  5. Step 5: Solve for x
    x = 520,453,285,979.76/615,111.60
  6. Step 6: Final answer
    x = 846,111.97

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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.