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Finding the Fourth Proportional to 368,917.21, 509,142.06 and 215,946.13

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Solution

The fourth proportional to 368,917.21, 509,142.06 and 215,946.13 is: 298,026.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,917.21 : 509,142.06 = 215,946.13 : x
  2. Step 2: Convert to fraction form
    368,917.21/509,142.06 = 215,946.13/x
  3. Step 3: Cross multiply
    368,917.21x = 509,142.06 × 215,946.13
  4. Step 4: Simplify right side
    368,917.21x = 109,947,257,477.23
  5. Step 5: Solve for x
    x = 109,947,257,477.23/368,917.21
  6. Step 6: Final answer
    x = 298,026.91

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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.