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Finding the Fourth Proportional to 676,698.36, 933,874.74 and 386,388.54

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Solution

The fourth proportional to 676,698.36, 933,874.74 and 386,388.54 is: 533,233.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,698.36 : 933,874.74 = 386,388.54 : x
  2. Step 2: Convert to fraction form
    676,698.36/933,874.74 = 386,388.54/x
  3. Step 3: Cross multiply
    676,698.36x = 933,874.74 × 386,388.54
  4. Step 4: Simplify right side
    676,698.36x = 360,838,497,331.48
  5. Step 5: Solve for x
    x = 360,838,497,331.48/676,698.36
  6. Step 6: Final answer
    x = 533,233.89

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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.