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Finding the Fourth Proportional to 505,371.12, 697,473.32 and 287,632.76

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Solution

The fourth proportional to 505,371.12, 697,473.32 and 287,632.76 is: 396,968.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,371.12 : 697,473.32 = 287,632.76 : x
  2. Step 2: Convert to fraction form
    505,371.12/697,473.32 = 287,632.76/x
  3. Step 3: Cross multiply
    505,371.12x = 697,473.32 × 287,632.76
  4. Step 4: Simplify right side
    505,371.12x = 200,616,171,132.43
  5. Step 5: Solve for x
    x = 200,616,171,132.43/505,371.12
  6. Step 6: Final answer
    x = 396,968.02

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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.