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Finding the Fourth Proportional to 665,990.73, 919,048.55 and 364,178.25

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Solution

The fourth proportional to 665,990.73, 919,048.55 and 364,178.25 is: 502,555.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,990.73 : 919,048.55 = 364,178.25 : x
  2. Step 2: Convert to fraction form
    665,990.73/919,048.55 = 364,178.25/x
  3. Step 3: Cross multiply
    665,990.73x = 919,048.55 × 364,178.25
  4. Step 4: Simplify right side
    665,990.73x = 334,697,490,783.15
  5. Step 5: Solve for x
    x = 334,697,490,783.15/665,990.73
  6. Step 6: Final answer
    x = 502,555.78

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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.