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Finding the Fourth Proportional to 228,003.40, 342,005.10 and 128,470.60

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Solution

The fourth proportional to 228,003.40, 342,005.10 and 128,470.60 is: 192,705.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,003.40 : 342,005.10 = 128,470.60 : x
  2. Step 2: Convert to fraction form
    228,003.40/342,005.10 = 128,470.60/x
  3. Step 3: Cross multiply
    228,003.40x = 342,005.10 × 128,470.60
  4. Step 4: Simplify right side
    228,003.40x = 43,937,600,400.06
  5. Step 5: Solve for x
    x = 43,937,600,400.06/228,003.40
  6. Step 6: Final answer
    x = 192,705.90

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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.