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Finding the Fourth Proportional to 368,460.60, 551,378.70 and 255,611.40

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Solution

The fourth proportional to 368,460.60, 551,378.70 and 255,611.40 is: 382,506.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,460.60 : 551,378.70 = 255,611.40 : x
  2. Step 2: Convert to fraction form
    368,460.60/551,378.70 = 255,611.40/x
  3. Step 3: Cross multiply
    368,460.60x = 551,378.70 × 255,611.40
  4. Step 4: Simplify right side
    368,460.60x = 140,938,681,437.18
  5. Step 5: Solve for x
    x = 140,938,681,437.18/368,460.60
  6. Step 6: Final answer
    x = 382,506.79

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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.