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Finding the Fourth Proportional to 518,117.20, 777,175.80 and 307,646.80

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Solution

The fourth proportional to 518,117.20, 777,175.80 and 307,646.80 is: 461,470.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,117.20 : 777,175.80 = 307,646.80 : x
  2. Step 2: Convert to fraction form
    518,117.20/777,175.80 = 307,646.80/x
  3. Step 3: Cross multiply
    518,117.20x = 777,175.80 × 307,646.80
  4. Step 4: Simplify right side
    518,117.20x = 239,095,647,907.44
  5. Step 5: Solve for x
    x = 239,095,647,907.44/518,117.20
  6. Step 6: Final answer
    x = 461,470.20

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1.5x scale

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.