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Finding the Fourth Proportional to 371,509.71, 512,685.36 and 210,396.12

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Solution

The fourth proportional to 371,509.71, 512,685.36 and 210,396.12 is: 290,347.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,509.71 : 512,685.36 = 210,396.12 : x
  2. Step 2: Convert to fraction form
    371,509.71/512,685.36 = 210,396.12/x
  3. Step 3: Cross multiply
    371,509.71x = 512,685.36 × 210,396.12
  4. Step 4: Simplify right side
    371,509.71x = 107,867,010,524.80
  5. Step 5: Solve for x
    x = 107,867,010,524.80/371,509.71
  6. Step 6: Final answer
    x = 290,347.76

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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.