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Finding the Fourth Proportional to 690,382.56, 952,667.28 and 384,435.84

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Solution

The fourth proportional to 690,382.56, 952,667.28 and 384,435.84 is: 530,487.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,382.56 : 952,667.28 = 384,435.84 : x
  2. Step 2: Convert to fraction form
    690,382.56/952,667.28 = 384,435.84/x
  3. Step 3: Cross multiply
    690,382.56x = 952,667.28 × 384,435.84
  4. Step 4: Simplify right side
    690,382.56x = 366,239,446,027.32
  5. Step 5: Solve for x
    x = 366,239,446,027.32/690,382.56
  6. Step 6: Final answer
    x = 530,487.69

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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.