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Finding the Fourth Proportional to 447,619.56, 617,713.20 and 243,681.81

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Solution

The fourth proportional to 447,619.56, 617,713.20 and 243,681.81 is: 336,279.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,619.56 : 617,713.20 = 243,681.81 : x
  2. Step 2: Convert to fraction form
    447,619.56/617,713.20 = 243,681.81/x
  3. Step 3: Cross multiply
    447,619.56x = 617,713.20 × 243,681.81
  4. Step 4: Simplify right side
    447,619.56x = 150,525,470,636.89
  5. Step 5: Solve for x
    x = 150,525,470,636.89/447,619.56
  6. Step 6: Final answer
    x = 336,279.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.