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Finding the Fourth Proportional to 808,612.80, 1,213,210.80 and 335,443.20

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Solution

The fourth proportional to 808,612.80, 1,213,210.80 and 335,443.20 is: 503,285.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,612.80 : 1,213,210.80 = 335,443.20 : x
  2. Step 2: Convert to fraction form
    808,612.80/1,213,210.80 = 335,443.20/x
  3. Step 3: Cross multiply
    808,612.80x = 1,213,210.80 × 335,443.20
  4. Step 4: Simplify right side
    808,612.80x = 406,963,313,026.56
  5. Step 5: Solve for x
    x = 406,963,313,026.56/808,612.80
  6. Step 6: Final answer
    x = 503,285.77

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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.