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Finding the Fourth Proportional to 268,870.59, 403,211.79 and 79,280.64

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Solution

The fourth proportional to 268,870.59, 403,211.79 and 79,280.64 is: 118,893.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,870.59 : 403,211.79 = 79,280.64 : x
  2. Step 2: Convert to fraction form
    268,870.59/403,211.79 = 79,280.64/x
  3. Step 3: Cross multiply
    268,870.59x = 403,211.79 × 79,280.64
  4. Step 4: Simplify right side
    268,870.59x = 31,966,888,766.75
  5. Step 5: Solve for x
    x = 31,966,888,766.75/268,870.59
  6. Step 6: Final answer
    x = 118,893.21

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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.