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Finding the Fourth Proportional to 859,238.40, 1,289,318.40 and 360,652.80

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Solution

The fourth proportional to 859,238.40, 1,289,318.40 and 360,652.80 is: 541,172.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,238.40 : 1,289,318.40 = 360,652.80 : x
  2. Step 2: Convert to fraction form
    859,238.40/1,289,318.40 = 360,652.80/x
  3. Step 3: Cross multiply
    859,238.40x = 1,289,318.40 × 360,652.80
  4. Step 4: Simplify right side
    859,238.40x = 464,996,291,051.52
  5. Step 5: Solve for x
    x = 464,996,291,051.52/859,238.40
  6. Step 6: Final answer
    x = 541,172.61

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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.