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Finding the Fourth Proportional to 405,302.76, 607,966.46 and 139,059.52

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Solution

The fourth proportional to 405,302.76, 607,966.46 and 139,059.52 is: 208,593.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,302.76 : 607,966.46 = 139,059.52 : x
  2. Step 2: Convert to fraction form
    405,302.76/607,966.46 = 139,059.52/x
  3. Step 3: Cross multiply
    405,302.76x = 607,966.46 × 139,059.52
  4. Step 4: Simplify right side
    405,302.76x = 84,543,524,103.70
  5. Step 5: Solve for x
    x = 84,543,524,103.70/405,302.76
  6. Step 6: Final answer
    x = 208,593.51

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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.