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Finding the Fourth Proportional to 554,393.15, 765,062.39 and 312,675.17

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Solution

The fourth proportional to 554,393.15, 765,062.39 and 312,675.17 is: 431,491.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,393.15 : 765,062.39 = 312,675.17 : x
  2. Step 2: Convert to fraction form
    554,393.15/765,062.39 = 312,675.17/x
  3. Step 3: Cross multiply
    554,393.15x = 765,062.39 × 312,675.17
  4. Step 4: Simplify right side
    554,393.15x = 239,216,007,465.17
  5. Step 5: Solve for x
    x = 239,216,007,465.17/554,393.15
  6. Step 6: Final answer
    x = 431,491.64

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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.