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Finding the Fourth Proportional to 612,387.15, 845,046.40 and 340,438.49

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Solution

The fourth proportional to 612,387.15, 845,046.40 and 340,438.49 is: 469,778.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,387.15 : 845,046.40 = 340,438.49 : x
  2. Step 2: Convert to fraction form
    612,387.15/845,046.40 = 340,438.49/x
  3. Step 3: Cross multiply
    612,387.15x = 845,046.40 × 340,438.49
  4. Step 4: Simplify right side
    612,387.15x = 287,686,320,395.94
  5. Step 5: Solve for x
    x = 287,686,320,395.94/612,387.15
  6. Step 6: Final answer
    x = 469,778.51

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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.