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Finding the Fourth Proportional to 307,891.40, 429,998.20 and 307,891.40

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Solution

The fourth proportional to 307,891.40, 429,998.20 and 307,891.40 is: 429,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,891.40 : 429,998.20 = 307,891.40 : x
  2. Step 2: Convert to fraction form
    307,891.40/429,998.20 = 307,891.40/x
  3. Step 3: Cross multiply
    307,891.40x = 429,998.20 × 307,891.40
  4. Step 4: Simplify right side
    307,891.40x = 132,392,747,795.48
  5. Step 5: Solve for x
    x = 132,392,747,795.48/307,891.40
  6. Step 6: Final answer
    x = 429,998.20

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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.