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Finding the Fourth Proportional to 371,607.86, 512,783.52 and 210,431.90

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Solution

The fourth proportional to 371,607.86, 512,783.52 and 210,431.90 is: 290,376.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,607.86 : 512,783.52 = 210,431.90 : x
  2. Step 2: Convert to fraction form
    371,607.86/512,783.52 = 210,431.90/x
  3. Step 3: Cross multiply
    371,607.86x = 512,783.52 × 210,431.90
  4. Step 4: Simplify right side
    371,607.86x = 107,906,010,402.29
  5. Step 5: Solve for x
    x = 107,906,010,402.29/371,607.86
  6. Step 6: Final answer
    x = 290,376.02

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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.