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Finding the Fourth Proportional to 612,794.90, 845,644.48 and 340,856.94

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Solution

The fourth proportional to 612,794.90, 845,644.48 and 340,856.94 is: 470,375.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,794.90 : 845,644.48 = 340,856.94 : x
  2. Step 2: Convert to fraction form
    612,794.90/845,644.48 = 340,856.94/x
  3. Step 3: Cross multiply
    612,794.90x = 845,644.48 × 340,856.94
  4. Step 4: Simplify right side
    612,794.90x = 288,243,789,780.69
  5. Step 5: Solve for x
    x = 288,243,789,780.69/612,794.90
  6. Step 6: Final answer
    x = 470,375.63

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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.