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Finding the Fourth Proportional to 285,915.12, 394,560 and 158,590.32

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Solution

The fourth proportional to 285,915.12, 394,560 and 158,590.32 is: 218,853.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,915.12 : 394,560 = 158,590.32 : x
  2. Step 2: Convert to fraction form
    285,915.12/394,560 = 158,590.32/x
  3. Step 3: Cross multiply
    285,915.12x = 394,560 × 158,590.32
  4. Step 4: Simplify right side
    285,915.12x = 62,573,396,659.20
  5. Step 5: Solve for x
    x = 62,573,396,659.20/285,915.12
  6. Step 6: Final answer
    x = 218,853.05

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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.