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Finding the Fourth Proportional to 307,216.10, 431,346.70 and 307,216.10

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Solution

The fourth proportional to 307,216.10, 431,346.70 and 307,216.10 is: 431,346.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,216.10 : 431,346.70 = 307,216.10 : x
  2. Step 2: Convert to fraction form
    307,216.10/431,346.70 = 307,216.10/x
  3. Step 3: Cross multiply
    307,216.10x = 431,346.70 × 307,216.10
  4. Step 4: Simplify right side
    307,216.10x = 132,516,650,921.87
  5. Step 5: Solve for x
    x = 132,516,650,921.87/307,216.10
  6. Step 6: Final answer
    x = 431,346.70

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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.