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Finding the Fourth Proportional to 314,858.20, 472,287.30 and 128,003.80

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Solution

The fourth proportional to 314,858.20, 472,287.30 and 128,003.80 is: 192,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,858.20 : 472,287.30 = 128,003.80 : x
  2. Step 2: Convert to fraction form
    314,858.20/472,287.30 = 128,003.80/x
  3. Step 3: Cross multiply
    314,858.20x = 472,287.30 × 128,003.80
  4. Step 4: Simplify right side
    314,858.20x = 60,454,569,091.74
  5. Step 5: Solve for x
    x = 60,454,569,091.74/314,858.20
  6. Step 6: Final answer
    x = 192,005.70

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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.