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Finding the Fourth Proportional to 247,276.40, 370,828.20 and 128,908.40

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Solution

The fourth proportional to 247,276.40, 370,828.20 and 128,908.40 is: 193,317.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,276.40 : 370,828.20 = 128,908.40 : x
  2. Step 2: Convert to fraction form
    247,276.40/370,828.20 = 128,908.40/x
  3. Step 3: Cross multiply
    247,276.40x = 370,828.20 × 128,908.40
  4. Step 4: Simplify right side
    247,276.40x = 47,802,869,936.88
  5. Step 5: Solve for x
    x = 47,802,869,936.88/247,276.40
  6. Step 6: Final answer
    x = 193,317.56

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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.