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Finding the Fourth Proportional to 636,871.36, 878,889.43 and 346,484.57

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Solution

The fourth proportional to 636,871.36, 878,889.43 and 346,484.57 is: 478,152.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,871.36 : 878,889.43 = 346,484.57 : x
  2. Step 2: Convert to fraction form
    636,871.36/878,889.43 = 346,484.57/x
  3. Step 3: Cross multiply
    636,871.36x = 878,889.43 × 346,484.57
  4. Step 4: Simplify right side
    636,871.36x = 304,521,623,244.24
  5. Step 5: Solve for x
    x = 304,521,623,244.24/636,871.36
  6. Step 6: Final answer
    x = 478,152.48

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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.