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Finding the Fourth Proportional to 539,288.64, 808,303.16 and 405,739.88

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Solution

The fourth proportional to 539,288.64, 808,303.16 and 405,739.88 is: 608,135.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,288.64 : 808,303.16 = 405,739.88 : x
  2. Step 2: Convert to fraction form
    539,288.64/808,303.16 = 405,739.88/x
  3. Step 3: Cross multiply
    539,288.64x = 808,303.16 × 405,739.88
  4. Step 4: Simplify right side
    539,288.64x = 327,960,827,142.02
  5. Step 5: Solve for x
    x = 327,960,827,142.02/539,288.64
  6. Step 6: Final answer
    x = 608,135.98

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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.