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Finding the Fourth Proportional to 221,608.20, 311,038.80 and 221,608.20

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Solution

The fourth proportional to 221,608.20, 311,038.80 and 221,608.20 is: 311,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,608.20 : 311,038.80 = 221,608.20 : x
  2. Step 2: Convert to fraction form
    221,608.20/311,038.80 = 221,608.20/x
  3. Step 3: Cross multiply
    221,608.20x = 311,038.80 × 221,608.20
  4. Step 4: Simplify right side
    221,608.20x = 68,928,748,598.16
  5. Step 5: Solve for x
    x = 68,928,748,598.16/221,608.20
  6. Step 6: Final answer
    x = 311,038.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.