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Finding the Fourth Proportional to 612,078.93, 844,652.10 and 340,139.86

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Solution

The fourth proportional to 612,078.93, 844,652.10 and 340,139.86 is: 469,383.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,078.93 : 844,652.10 = 340,139.86 : x
  2. Step 2: Convert to fraction form
    612,078.93/844,652.10 = 340,139.86/x
  3. Step 3: Cross multiply
    612,078.93x = 844,652.10 × 340,139.86
  4. Step 4: Simplify right side
    612,078.93x = 287,299,846,206.60
  5. Step 5: Solve for x
    x = 287,299,846,206.60/612,078.93
  6. Step 6: Final answer
    x = 469,383.66

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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.