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Finding the Fourth Proportional to 485,903.60, 670,859.16 and 304,863.92

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Solution

The fourth proportional to 485,903.60, 670,859.16 and 304,863.92 is: 420,908.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,903.60 : 670,859.16 = 304,863.92 : x
  2. Step 2: Convert to fraction form
    485,903.60/670,859.16 = 304,863.92/x
  3. Step 3: Cross multiply
    485,903.60x = 670,859.16 × 304,863.92
  4. Step 4: Simplify right side
    485,903.60x = 204,520,753,285.51
  5. Step 5: Solve for x
    x = 204,520,753,285.51/485,903.60
  6. Step 6: Final answer
    x = 420,908.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.