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Finding the Fourth Proportional to 645,126.77, 890,305.32 and 358,651.64

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Solution

The fourth proportional to 645,126.77, 890,305.32 and 358,651.64 is: 494,956.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,126.77 : 890,305.32 = 358,651.64 : x
  2. Step 2: Convert to fraction form
    645,126.77/890,305.32 = 358,651.64/x
  3. Step 3: Cross multiply
    645,126.77x = 890,305.32 × 358,651.64
  4. Step 4: Simplify right side
    645,126.77x = 319,309,463,118.73
  5. Step 5: Solve for x
    x = 319,309,463,118.73/645,126.77
  6. Step 6: Final answer
    x = 494,956.15

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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.