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Finding the Fourth Proportional to 309,631.45, 432,959.15 and 309,631.45

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Solution

The fourth proportional to 309,631.45, 432,959.15 and 309,631.45 is: 432,959.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,631.45 : 432,959.15 = 309,631.45 : x
  2. Step 2: Convert to fraction form
    309,631.45/432,959.15 = 309,631.45/x
  3. Step 3: Cross multiply
    309,631.45x = 432,959.15 × 309,631.45
  4. Step 4: Simplify right side
    309,631.45x = 134,057,769,405.27
  5. Step 5: Solve for x
    x = 134,057,769,405.27/309,631.45
  6. Step 6: Final answer
    x = 432,959.15

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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.