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Finding the Fourth Proportional to 307,210.60, 431,339 and 307,210.60

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Solution

The fourth proportional to 307,210.60, 431,339 and 307,210.60 is: 431,339

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,210.60 : 431,339 = 307,210.60 : x
  2. Step 2: Convert to fraction form
    307,210.60/431,339 = 307,210.60/x
  3. Step 3: Cross multiply
    307,210.60x = 431,339 × 307,210.60
  4. Step 4: Simplify right side
    307,210.60x = 132,511,912,993.40
  5. Step 5: Solve for x
    x = 132,511,912,993.40/307,210.60
  6. Step 6: Final answer
    x = 431,339

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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.