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Finding the Fourth Proportional to 617,620.80, 927,986.40 and 393,088.80

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Solution

The fourth proportional to 617,620.80, 927,986.40 and 393,088.80 is: 590,623.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,620.80 : 927,986.40 = 393,088.80 : x
  2. Step 2: Convert to fraction form
    617,620.80/927,986.40 = 393,088.80/x
  3. Step 3: Cross multiply
    617,620.80x = 927,986.40 × 393,088.80
  4. Step 4: Simplify right side
    617,620.80x = 364,781,060,392.32
  5. Step 5: Solve for x
    x = 364,781,060,392.32/617,620.80
  6. Step 6: Final answer
    x = 590,623.02

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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.