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Finding the Fourth Proportional to 645,383.82, 890,524.86 and 358,896.54

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Solution

The fourth proportional to 645,383.82, 890,524.86 and 358,896.54 is: 495,218.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,383.82 : 890,524.86 = 358,896.54 : x
  2. Step 2: Convert to fraction form
    645,383.82/890,524.86 = 358,896.54/x
  3. Step 3: Cross multiply
    645,383.82x = 890,524.86 × 358,896.54
  4. Step 4: Simplify right side
    645,383.82x = 319,606,291,037.98
  5. Step 5: Solve for x
    x = 319,606,291,037.98/645,383.82
  6. Step 6: Final answer
    x = 495,218.94

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1.5x scale

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.