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Finding the Fourth Proportional to 474,121.20, 711,284.20 and 141,730.80

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Solution

The fourth proportional to 474,121.20, 711,284.20 and 141,730.80 is: 212,626.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,121.20 : 711,284.20 = 141,730.80 : x
  2. Step 2: Convert to fraction form
    474,121.20/711,284.20 = 141,730.80/x
  3. Step 3: Cross multiply
    474,121.20x = 711,284.20 × 141,730.80
  4. Step 4: Simplify right side
    474,121.20x = 100,810,878,693.36
  5. Step 5: Solve for x
    x = 100,810,878,693.36/474,121.20
  6. Step 6: Final answer
    x = 212,626.81

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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.