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Finding the Fourth Proportional to 520,087.95, 780,131.93 and 253,889.55

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Solution

The fourth proportional to 520,087.95, 780,131.93 and 253,889.55 is: 380,834.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,087.95 : 780,131.93 = 253,889.55 : x
  2. Step 2: Convert to fraction form
    520,087.95/780,131.93 = 253,889.55/x
  3. Step 3: Cross multiply
    520,087.95x = 780,131.93 × 253,889.55
  4. Step 4: Simplify right side
    520,087.95x = 198,067,343,378.88
  5. Step 5: Solve for x
    x = 198,067,343,378.88/520,087.95
  6. Step 6: Final answer
    x = 380,834.33

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Double scale
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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.