Home / 399,931.79-551,907.82-218,643.73

Finding the Fourth Proportional to 399,931.79, 551,907.82 and 218,643.73

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Solution

The fourth proportional to 399,931.79, 551,907.82 and 218,643.73 is: 301,729.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,931.79 : 551,907.82 = 218,643.73 : x
  2. Step 2: Convert to fraction form
    399,931.79/551,907.82 = 218,643.73/x
  3. Step 3: Cross multiply
    399,931.79x = 551,907.82 × 218,643.73
  4. Step 4: Simplify right side
    399,931.79x = 120,671,184,380.97
  5. Step 5: Solve for x
    x = 120,671,184,380.97/399,931.79
  6. Step 6: Final answer
    x = 301,729.41

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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.