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Finding the Fourth Proportional to 445,068, 667,707 and 145,547.40

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Solution

The fourth proportional to 445,068, 667,707 and 145,547.40 is: 218,355.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,068 : 667,707 = 145,547.40 : x
  2. Step 2: Convert to fraction form
    445,068/667,707 = 145,547.40/x
  3. Step 3: Cross multiply
    445,068x = 667,707 × 145,547.40
  4. Step 4: Simplify right side
    445,068x = 97,183,017,811.80
  5. Step 5: Solve for x
    x = 97,183,017,811.80/445,068
  6. Step 6: Final answer
    x = 218,355.44

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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.