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Finding the Fourth Proportional to 312,267.60, 430,656.84 and 251,820.72

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Solution

The fourth proportional to 312,267.60, 430,656.84 and 251,820.72 is: 347,292.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,267.60 : 430,656.84 = 251,820.72 : x
  2. Step 2: Convert to fraction form
    312,267.60/430,656.84 = 251,820.72/x
  3. Step 3: Cross multiply
    312,267.60x = 430,656.84 × 251,820.72
  4. Step 4: Simplify right side
    312,267.60x = 108,448,315,521.73
  5. Step 5: Solve for x
    x = 108,448,315,521.73/312,267.60
  6. Step 6: Final answer
    x = 347,292.88

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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.