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Finding the Fourth Proportional to 612,066.36, 918,247.14 and 212,649

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Solution

The fourth proportional to 612,066.36, 918,247.14 and 212,649 is: 319,024.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,066.36 : 918,247.14 = 212,649 : x
  2. Step 2: Convert to fraction form
    612,066.36/918,247.14 = 212,649/x
  3. Step 3: Cross multiply
    612,066.36x = 918,247.14 × 212,649
  4. Step 4: Simplify right side
    612,066.36x = 195,264,336,073.86
  5. Step 5: Solve for x
    x = 195,264,336,073.86/612,066.36
  6. Step 6: Final answer
    x = 319,024.78

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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.