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Finding the Fourth Proportional to 636,303.90, 878,091.48 and 349,821.48

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Solution

The fourth proportional to 636,303.90, 878,091.48 and 349,821.48 is: 482,749.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,303.90 : 878,091.48 = 349,821.48 : x
  2. Step 2: Convert to fraction form
    636,303.90/878,091.48 = 349,821.48/x
  3. Step 3: Cross multiply
    636,303.90x = 878,091.48 × 349,821.48
  4. Step 4: Simplify right side
    636,303.90x = 307,175,261,108.99
  5. Step 5: Solve for x
    x = 307,175,261,108.99/636,303.90
  6. Step 6: Final answer
    x = 482,749.30

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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.