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Finding the Fourth Proportional to 207,618.10, 311,427.15 and 170,220.40

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Solution

The fourth proportional to 207,618.10, 311,427.15 and 170,220.40 is: 255,330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,618.10 : 311,427.15 = 170,220.40 : x
  2. Step 2: Convert to fraction form
    207,618.10/311,427.15 = 170,220.40/x
  3. Step 3: Cross multiply
    207,618.10x = 311,427.15 × 170,220.40
  4. Step 4: Simplify right side
    207,618.10x = 53,011,254,043.86
  5. Step 5: Solve for x
    x = 53,011,254,043.86/207,618.10
  6. Step 6: Final answer
    x = 255,330.60

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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.