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Finding the Fourth Proportional to 645,003.90, 967,256.91 and 212,617.53

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Solution

The fourth proportional to 645,003.90, 967,256.91 and 212,617.53 is: 318,844.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,003.90 : 967,256.91 = 212,617.53 : x
  2. Step 2: Convert to fraction form
    645,003.90/967,256.91 = 212,617.53/x
  3. Step 3: Cross multiply
    645,003.90x = 967,256.91 × 212,617.53
  4. Step 4: Simplify right side
    645,003.90x = 205,655,775,079.63
  5. Step 5: Solve for x
    x = 205,655,775,079.63/645,003.90
  6. Step 6: Final answer
    x = 318,844.24

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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.