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Finding the Fourth Proportional to 577,116.15, 796,395.61 and 318,979.88

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Solution

The fourth proportional to 577,116.15, 796,395.61 and 318,979.88 is: 440,178.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,116.15 : 796,395.61 = 318,979.88 : x
  2. Step 2: Convert to fraction form
    577,116.15/796,395.61 = 318,979.88/x
  3. Step 3: Cross multiply
    577,116.15x = 796,395.61 × 318,979.88
  4. Step 4: Simplify right side
    577,116.15x = 254,034,174,515.43
  5. Step 5: Solve for x
    x = 254,034,174,515.43/577,116.15
  6. Step 6: Final answer
    x = 440,178.60

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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.