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Finding the Fourth Proportional to 405,322.12, 607,931.34 and 168,620.68

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Solution

The fourth proportional to 405,322.12, 607,931.34 and 168,620.68 is: 252,909.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,322.12 : 607,931.34 = 168,620.68 : x
  2. Step 2: Convert to fraction form
    405,322.12/607,931.34 = 168,620.68/x
  3. Step 3: Cross multiply
    405,322.12x = 607,931.34 × 168,620.68
  4. Step 4: Simplify right side
    405,322.12x = 102,509,795,944.11
  5. Step 5: Solve for x
    x = 102,509,795,944.11/405,322.12
  6. Step 6: Final answer
    x = 252,909.45

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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.