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Finding the Fourth Proportional to 612,620.92, 918,132.72 and 312,848.83

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Solution

The fourth proportional to 612,620.92, 918,132.72 and 312,848.83 is: 468,865.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,620.92 : 918,132.72 = 312,848.83 : x
  2. Step 2: Convert to fraction form
    612,620.92/918,132.72 = 312,848.83/x
  3. Step 3: Cross multiply
    612,620.92x = 918,132.72 × 312,848.83
  4. Step 4: Simplify right side
    612,620.92x = 287,236,747,236.72
  5. Step 5: Solve for x
    x = 287,236,747,236.72/612,620.92
  6. Step 6: Final answer
    x = 468,865.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.