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Finding the Fourth Proportional to 636,394.12, 878,238.79 and 346,022.21

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Solution

The fourth proportional to 636,394.12, 878,238.79 and 346,022.21 is: 477,518.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,394.12 : 878,238.79 = 346,022.21 : x
  2. Step 2: Convert to fraction form
    636,394.12/878,238.79 = 346,022.21/x
  3. Step 3: Cross multiply
    636,394.12x = 878,238.79 × 346,022.21
  4. Step 4: Simplify right side
    636,394.12x = 303,890,128,354.07
  5. Step 5: Solve for x
    x = 303,890,128,354.07/636,394.12
  6. Step 6: Final answer
    x = 477,518.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.