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Finding the Fourth Proportional to 319,061.90, 478,592.83 and 218,918.49

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Solution

The fourth proportional to 319,061.90, 478,592.83 and 218,918.49 is: 328,377.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,061.90 : 478,592.83 = 218,918.49 : x
  2. Step 2: Convert to fraction form
    319,061.90/478,592.83 = 218,918.49/x
  3. Step 3: Cross multiply
    319,061.90x = 478,592.83 × 218,918.49
  4. Step 4: Simplify right side
    319,061.90x = 104,772,819,668.43
  5. Step 5: Solve for x
    x = 104,772,819,668.43/319,061.90
  6. Step 6: Final answer
    x = 328,377.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.