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Finding the Fourth Proportional to 371,722.92, 512,978.88 and 210,607.80

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Solution

The fourth proportional to 371,722.92, 512,978.88 and 210,607.80 is: 290,639.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,722.92 : 512,978.88 = 210,607.80 : x
  2. Step 2: Convert to fraction form
    371,722.92/512,978.88 = 210,607.80/x
  3. Step 3: Cross multiply
    371,722.92x = 512,978.88 × 210,607.80
  4. Step 4: Simplify right side
    371,722.92x = 108,037,353,363.26
  5. Step 5: Solve for x
    x = 108,037,353,363.26/371,722.92
  6. Step 6: Final answer
    x = 290,639.47

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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.