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Finding the Fourth Proportional to 278,807.91, 384,758.42 and 151,485.63

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Solution

The fourth proportional to 278,807.91, 384,758.42 and 151,485.63 is: 209,052.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,807.91 : 384,758.42 = 151,485.63 : x
  2. Step 2: Convert to fraction form
    278,807.91/384,758.42 = 151,485.63/x
  3. Step 3: Cross multiply
    278,807.91x = 384,758.42 × 151,485.63
  4. Step 4: Simplify right side
    278,807.91x = 58,285,370,894.08
  5. Step 5: Solve for x
    x = 58,285,370,894.08/278,807.91
  6. Step 6: Final answer
    x = 209,052.07

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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.