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Finding the Fourth Proportional to 445,204.76, 666,210.80 and 385,438.79

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Solution

The fourth proportional to 445,204.76, 666,210.80 and 385,438.79 is: 576,776.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,204.76 : 666,210.80 = 385,438.79 : x
  2. Step 2: Convert to fraction form
    445,204.76/666,210.80 = 385,438.79/x
  3. Step 3: Cross multiply
    445,204.76x = 666,210.80 × 385,438.79
  4. Step 4: Simplify right side
    445,204.76x = 256,783,482,269.48
  5. Step 5: Solve for x
    x = 256,783,482,269.48/445,204.76
  6. Step 6: Final answer
    x = 576,776.14

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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.