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Finding the Fourth Proportional to 480,989.56, 663,476.40 and 317,647.56

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Solution

The fourth proportional to 480,989.56, 663,476.40 and 317,647.56 is: 438,162.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,989.56 : 663,476.40 = 317,647.56 : x
  2. Step 2: Convert to fraction form
    480,989.56/663,476.40 = 317,647.56/x
  3. Step 3: Cross multiply
    480,989.56x = 663,476.40 × 317,647.56
  4. Step 4: Simplify right side
    480,989.56x = 210,751,659,577.58
  5. Step 5: Solve for x
    x = 210,751,659,577.58/480,989.56
  6. Step 6: Final answer
    x = 438,162.65

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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.