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Finding the Fourth Proportional to 427,437.04, 640,313.01 and 347,565.16

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Solution

The fourth proportional to 427,437.04, 640,313.01 and 347,565.16 is: 520,662.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,437.04 : 640,313.01 = 347,565.16 : x
  2. Step 2: Convert to fraction form
    427,437.04/640,313.01 = 347,565.16/x
  3. Step 3: Cross multiply
    427,437.04x = 640,313.01 × 347,565.16
  4. Step 4: Simplify right side
    427,437.04x = 222,550,493,770.73
  5. Step 5: Solve for x
    x = 222,550,493,770.73/427,437.04
  6. Step 6: Final answer
    x = 520,662.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.