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Finding the Fourth Proportional to 420,667.83, 581,135.72 and 363,980.79

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Solution

The fourth proportional to 420,667.83, 581,135.72 and 363,980.79 is: 502,824.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,667.83 : 581,135.72 = 363,980.79 : x
  2. Step 2: Convert to fraction form
    420,667.83/581,135.72 = 363,980.79/x
  3. Step 3: Cross multiply
    420,667.83x = 581,135.72 × 363,980.79
  4. Step 4: Simplify right side
    420,667.83x = 211,522,236,642.92
  5. Step 5: Solve for x
    x = 211,522,236,642.92/420,667.83
  6. Step 6: Final answer
    x = 502,824.85

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Double scale
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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.