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Finding the Fourth Proportional to 422,648.56, 583,314.82 and 261,555.49

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Solution

The fourth proportional to 422,648.56, 583,314.82 and 261,555.49 is: 360,983.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,648.56 : 583,314.82 = 261,555.49 : x
  2. Step 2: Convert to fraction form
    422,648.56/583,314.82 = 261,555.49/x
  3. Step 3: Cross multiply
    422,648.56x = 583,314.82 × 261,555.49
  4. Step 4: Simplify right side
    422,648.56x = 152,569,191,457.19
  5. Step 5: Solve for x
    x = 152,569,191,457.19/422,648.56
  6. Step 6: Final answer
    x = 360,983.58

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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.