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Finding the Fourth Proportional to 538,521.40, 807,782.10 and 159,455.80

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Solution

The fourth proportional to 538,521.40, 807,782.10 and 159,455.80 is: 239,183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,521.40 : 807,782.10 = 159,455.80 : x
  2. Step 2: Convert to fraction form
    538,521.40/807,782.10 = 159,455.80/x
  3. Step 3: Cross multiply
    538,521.40x = 807,782.10 × 159,455.80
  4. Step 4: Simplify right side
    538,521.40x = 128,805,540,981.18
  5. Step 5: Solve for x
    x = 128,805,540,981.18/538,521.40
  6. Step 6: Final answer
    x = 239,183.70

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.