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Finding the Fourth Proportional to 612,405.69, 845,045.97 and 340,438.74

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Solution

The fourth proportional to 612,405.69, 845,045.97 and 340,438.74 is: 469,764.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,405.69 : 845,045.97 = 340,438.74 : x
  2. Step 2: Convert to fraction form
    612,405.69/845,045.97 = 340,438.74/x
  3. Step 3: Cross multiply
    612,405.69x = 845,045.97 × 340,438.74
  4. Step 4: Simplify right side
    612,405.69x = 287,686,385,268.88
  5. Step 5: Solve for x
    x = 287,686,385,268.88/612,405.69
  6. Step 6: Final answer
    x = 469,764.39

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1.5x scale

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.