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Finding the Fourth Proportional to 279,034.34, 385,070.09 and 151,712.64

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Solution

The fourth proportional to 279,034.34, 385,070.09 and 151,712.64 is: 209,364.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,034.34 : 385,070.09 = 151,712.64 : x
  2. Step 2: Convert to fraction form
    279,034.34/385,070.09 = 151,712.64/x
  3. Step 3: Cross multiply
    279,034.34x = 385,070.09 × 151,712.64
  4. Step 4: Simplify right side
    279,034.34x = 58,419,999,180.37
  5. Step 5: Solve for x
    x = 58,419,999,180.37/279,034.34
  6. Step 6: Final answer
    x = 209,364.91

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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.