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Finding the Fourth Proportional to 278,361.64, 384,137.78 and 151,036.92

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Solution

The fourth proportional to 278,361.64, 384,137.78 and 151,036.92 is: 208,430.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,361.64 : 384,137.78 = 151,036.92 : x
  2. Step 2: Convert to fraction form
    278,361.64/384,137.78 = 151,036.92/x
  3. Step 3: Cross multiply
    278,361.64x = 384,137.78 × 151,036.92
  4. Step 4: Simplify right side
    278,361.64x = 58,018,987,146.84
  5. Step 5: Solve for x
    x = 58,018,987,146.84/278,361.64
  6. Step 6: Final answer
    x = 208,430.25

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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.