Home / 379,869.20-569,803.80-213,635.60

Finding the Fourth Proportional to 379,869.20, 569,803.80 and 213,635.60

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Solution

The fourth proportional to 379,869.20, 569,803.80 and 213,635.60 is: 320,453.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,869.20 : 569,803.80 = 213,635.60 : x
  2. Step 2: Convert to fraction form
    379,869.20/569,803.80 = 213,635.60/x
  3. Step 3: Cross multiply
    379,869.20x = 569,803.80 × 213,635.60
  4. Step 4: Simplify right side
    379,869.20x = 121,730,376,695.28
  5. Step 5: Solve for x
    x = 121,730,376,695.28/379,869.20
  6. Step 6: Final answer
    x = 320,453.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.