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Finding the Fourth Proportional to 310,553.76, 428,573.52 and 189,714.72

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Solution

The fourth proportional to 310,553.76, 428,573.52 and 189,714.72 is: 261,812.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,553.76 : 428,573.52 = 189,714.72 : x
  2. Step 2: Convert to fraction form
    310,553.76/428,573.52 = 189,714.72/x
  3. Step 3: Cross multiply
    310,553.76x = 428,573.52 × 189,714.72
  4. Step 4: Simplify right side
    310,553.76x = 81,306,705,346.21
  5. Step 5: Solve for x
    x = 81,306,705,346.21/310,553.76
  6. Step 6: Final answer
    x = 261,812.01

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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.