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Finding the Fourth Proportional to 445,322.60, 668,064.90 and 145,719.80

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Solution

The fourth proportional to 445,322.60, 668,064.90 and 145,719.80 is: 218,606.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,322.60 : 668,064.90 = 145,719.80 : x
  2. Step 2: Convert to fraction form
    445,322.60/668,064.90 = 145,719.80/x
  3. Step 3: Cross multiply
    445,322.60x = 668,064.90 × 145,719.80
  4. Step 4: Simplify right side
    445,322.60x = 97,350,283,615.02
  5. Step 5: Solve for x
    x = 97,350,283,615.02/445,322.60
  6. Step 6: Final answer
    x = 218,606.21

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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.