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Finding the Fourth Proportional to 445,384.65, 667,639.58 and 398,145.45

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Solution

The fourth proportional to 445,384.65, 667,639.58 and 398,145.45 is: 596,827.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,384.65 : 667,639.58 = 398,145.45 : x
  2. Step 2: Convert to fraction form
    445,384.65/667,639.58 = 398,145.45/x
  3. Step 3: Cross multiply
    445,384.65x = 667,639.58 × 398,145.45
  4. Step 4: Simplify right side
    445,384.65x = 265,817,659,026.18
  5. Step 5: Solve for x
    x = 265,817,659,026.18/445,384.65
  6. Step 6: Final answer
    x = 596,827.17

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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.