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Finding the Fourth Proportional to 371,912.16, 513,285.32 and 210,819.36

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Solution

The fourth proportional to 371,912.16, 513,285.32 and 210,819.36 is: 290,957.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,912.16 : 513,285.32 = 210,819.36 : x
  2. Step 2: Convert to fraction form
    371,912.16/513,285.32 = 210,819.36/x
  3. Step 3: Cross multiply
    371,912.16x = 513,285.32 × 210,819.36
  4. Step 4: Simplify right side
    371,912.16x = 108,210,482,659.80
  5. Step 5: Solve for x
    x = 108,210,482,659.80/371,912.16
  6. Step 6: Final answer
    x = 290,957.10

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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.