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Finding the Fourth Proportional to 279,042.64, 385,076.88 and 151,718.32

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Solution

The fourth proportional to 279,042.64, 385,076.88 and 151,718.32 is: 209,370.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,042.64 : 385,076.88 = 151,718.32 : x
  2. Step 2: Convert to fraction form
    279,042.64/385,076.88 = 151,718.32/x
  3. Step 3: Cross multiply
    279,042.64x = 385,076.88 × 151,718.32
  4. Step 4: Simplify right side
    279,042.64x = 58,423,217,304.44
  5. Step 5: Solve for x
    x = 58,423,217,304.44/279,042.64
  6. Step 6: Final answer
    x = 209,370.21

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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.