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Finding the Fourth Proportional to 636,390.56, 878,196.48 and 349,908.32

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Solution

The fourth proportional to 636,390.56, 878,196.48 and 349,908.32 is: 482,861.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,390.56 : 878,196.48 = 349,908.32 : x
  2. Step 2: Convert to fraction form
    636,390.56/878,196.48 = 349,908.32/x
  3. Step 3: Cross multiply
    636,390.56x = 878,196.48 × 349,908.32
  4. Step 4: Simplify right side
    636,390.56x = 307,288,254,946.71
  5. Step 5: Solve for x
    x = 307,288,254,946.71/636,390.56
  6. Step 6: Final answer
    x = 482,861.11

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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.