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Finding the Fourth Proportional to 307,631.40, 429,634.20 and 307,631.40

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Solution

The fourth proportional to 307,631.40, 429,634.20 and 307,631.40 is: 429,634.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,631.40 : 429,634.20 = 307,631.40 : x
  2. Step 2: Convert to fraction form
    307,631.40/429,634.20 = 307,631.40/x
  3. Step 3: Cross multiply
    307,631.40x = 429,634.20 × 307,631.40
  4. Step 4: Simplify right side
    307,631.40x = 132,168,970,433.88
  5. Step 5: Solve for x
    x = 132,168,970,433.88/307,631.40
  6. Step 6: Final answer
    x = 429,634.20

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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.