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Finding the Fourth Proportional to 518,313.40, 777,815.70 and 237,686.20

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Solution

The fourth proportional to 518,313.40, 777,815.70 and 237,686.20 is: 356,687.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,313.40 : 777,815.70 = 237,686.20 : x
  2. Step 2: Convert to fraction form
    518,313.40/777,815.70 = 237,686.20/x
  3. Step 3: Cross multiply
    518,313.40x = 777,815.70 × 237,686.20
  4. Step 4: Simplify right side
    518,313.40x = 184,876,058,033.34
  5. Step 5: Solve for x
    x = 184,876,058,033.34/518,313.40
  6. Step 6: Final answer
    x = 356,687.78

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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.