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Finding the Fourth Proportional to 278,460.78, 384,265.60 and 151,133.64

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Solution

The fourth proportional to 278,460.78, 384,265.60 and 151,133.64 is: 208,558.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,460.78 : 384,265.60 = 151,133.64 : x
  2. Step 2: Convert to fraction form
    278,460.78/384,265.60 = 151,133.64/x
  3. Step 3: Cross multiply
    278,460.78x = 384,265.60 × 151,133.64
  4. Step 4: Simplify right side
    278,460.78x = 58,075,458,476.95
  5. Step 5: Solve for x
    x = 58,075,458,476.95/278,460.78
  6. Step 6: Final answer
    x = 208,558.84

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1.5x scale

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.