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Finding the Fourth Proportional to 520,094.70, 780,142.05 and 485,102.70

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Solution

The fourth proportional to 520,094.70, 780,142.05 and 485,102.70 is: 727,654.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,094.70 : 780,142.05 = 485,102.70 : x
  2. Step 2: Convert to fraction form
    520,094.70/780,142.05 = 485,102.70/x
  3. Step 3: Cross multiply
    520,094.70x = 780,142.05 × 485,102.70
  4. Step 4: Simplify right side
    520,094.70x = 378,449,014,838.54
  5. Step 5: Solve for x
    x = 378,449,014,838.54/520,094.70
  6. Step 6: Final answer
    x = 727,654.05

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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.