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Finding the Fourth Proportional to 393,904.15, 590,732.28 and 127,602.88

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Solution

The fourth proportional to 393,904.15, 590,732.28 and 127,602.88 is: 191,364.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,904.15 : 590,732.28 = 127,602.88 : x
  2. Step 2: Convert to fraction form
    393,904.15/590,732.28 = 127,602.88/x
  3. Step 3: Cross multiply
    393,904.15x = 590,732.28 × 127,602.88
  4. Step 4: Simplify right side
    393,904.15x = 75,379,138,760.14
  5. Step 5: Solve for x
    x = 75,379,138,760.14/393,904.15
  6. Step 6: Final answer
    x = 191,364.17

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1.5x scale

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.