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Finding the Fourth Proportional to 612,445.62, 845,212.95 and 340,515.66

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Solution

The fourth proportional to 612,445.62, 845,212.95 and 340,515.66 is: 469,932.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,445.62 : 845,212.95 = 340,515.66 : x
  2. Step 2: Convert to fraction form
    612,445.62/845,212.95 = 340,515.66/x
  3. Step 3: Cross multiply
    612,445.62x = 845,212.95 × 340,515.66
  4. Step 4: Simplify right side
    612,445.62x = 287,808,245,509.80
  5. Step 5: Solve for x
    x = 287,808,245,509.80/612,445.62
  6. Step 6: Final answer
    x = 469,932.74

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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.