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Finding the Fourth Proportional to 656,628, 985,071.60 and 207,418.20

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Solution

The fourth proportional to 656,628, 985,071.60 and 207,418.20 is: 311,168.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,628 : 985,071.60 = 207,418.20 : x
  2. Step 2: Convert to fraction form
    656,628/985,071.60 = 207,418.20/x
  3. Step 3: Cross multiply
    656,628x = 985,071.60 × 207,418.20
  4. Step 4: Simplify right side
    656,628x = 204,321,778,143.12
  5. Step 5: Solve for x
    x = 204,321,778,143.12/656,628
  6. Step 6: Final answer
    x = 311,168.24

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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.