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Finding the Fourth Proportional to 612,414.87, 845,160.65 and 340,510.69

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Solution

The fourth proportional to 612,414.87, 845,160.65 and 340,510.69 is: 469,920.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,414.87 : 845,160.65 = 340,510.69 : x
  2. Step 2: Convert to fraction form
    612,414.87/845,160.65 = 340,510.69/x
  3. Step 3: Cross multiply
    612,414.87x = 845,160.65 × 340,510.69
  4. Step 4: Simplify right side
    612,414.87x = 287,786,236,092.35
  5. Step 5: Solve for x
    x = 287,786,236,092.35/612,414.87
  6. Step 6: Final answer
    x = 469,920.39

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Half scale
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Double scale
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Similar ratio
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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.