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Finding the Fourth Proportional to 554,427.11, 765,108.37 and 312,708.93

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Solution

The fourth proportional to 554,427.11, 765,108.37 and 312,708.93 is: 431,537.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,427.11 : 765,108.37 = 312,708.93 : x
  2. Step 2: Convert to fraction form
    554,427.11/765,108.37 = 312,708.93/x
  3. Step 3: Cross multiply
    554,427.11x = 765,108.37 × 312,708.93
  4. Step 4: Simplify right side
    554,427.11x = 239,256,219,716.74
  5. Step 5: Solve for x
    x = 239,256,219,716.74/554,427.11
  6. Step 6: Final answer
    x = 431,537.74

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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.