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Finding the Fourth Proportional to 526,907.70, 790,360.38 and 407,138.81

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Solution

The fourth proportional to 526,907.70, 790,360.38 and 407,138.81 is: 610,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,907.70 : 790,360.38 = 407,138.81 : x
  2. Step 2: Convert to fraction form
    526,907.70/790,360.38 = 407,138.81/x
  3. Step 3: Cross multiply
    526,907.70x = 790,360.38 × 407,138.81
  4. Step 4: Simplify right side
    526,907.70x = 321,786,380,632.55
  5. Step 5: Solve for x
    x = 321,786,380,632.55/526,907.70
  6. Step 6: Final answer
    x = 610,707.30

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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.