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Finding the Fourth Proportional to 445,855.21, 668,903.40 and 317,933.06

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Solution

The fourth proportional to 445,855.21, 668,903.40 and 317,933.06 is: 476,985.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,855.21 : 668,903.40 = 317,933.06 : x
  2. Step 2: Convert to fraction form
    445,855.21/668,903.40 = 317,933.06/x
  3. Step 3: Cross multiply
    445,855.21x = 668,903.40 × 317,933.06
  4. Step 4: Simplify right side
    445,855.21x = 212,666,501,261.57
  5. Step 5: Solve for x
    x = 212,666,501,261.57/445,855.21
  6. Step 6: Final answer
    x = 476,985.57

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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.