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Finding the Fourth Proportional to 644,802.45, 889,848.96 and 358,334.61

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Solution

The fourth proportional to 644,802.45, 889,848.96 and 358,334.61 is: 494,513.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,802.45 : 889,848.96 = 358,334.61 : x
  2. Step 2: Convert to fraction form
    644,802.45/889,848.96 = 358,334.61/x
  3. Step 3: Cross multiply
    644,802.45x = 889,848.96 × 358,334.61
  4. Step 4: Simplify right side
    644,802.45x = 318,863,673,799.59
  5. Step 5: Solve for x
    x = 318,863,673,799.59/644,802.45
  6. Step 6: Final answer
    x = 494,513.75

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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.