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Finding the Fourth Proportional to 379,696.84, 569,369.95 and 139,750.47

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Solution

The fourth proportional to 379,696.84, 569,369.95 and 139,750.47 is: 209,561.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,696.84 : 569,369.95 = 139,750.47 : x
  2. Step 2: Convert to fraction form
    379,696.84/569,369.95 = 139,750.47/x
  3. Step 3: Cross multiply
    379,696.84x = 569,369.95 × 139,750.47
  4. Step 4: Simplify right side
    379,696.84x = 79,569,718,116.38
  5. Step 5: Solve for x
    x = 79,569,718,116.38/379,696.84
  6. Step 6: Final answer
    x = 209,561.18

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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.