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Finding the Fourth Proportional to 379,695.84, 569,368.45 and 139,749.47

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Solution

The fourth proportional to 379,695.84, 569,368.45 and 139,749.47 is: 209,559.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,695.84 : 569,368.45 = 139,749.47 : x
  2. Step 2: Convert to fraction form
    379,695.84/569,368.45 = 139,749.47/x
  3. Step 3: Cross multiply
    379,695.84x = 569,368.45 × 139,749.47
  4. Step 4: Simplify right side
    379,695.84x = 79,568,939,122.22
  5. Step 5: Solve for x
    x = 79,568,939,122.22/379,695.84
  6. Step 6: Final answer
    x = 209,559.68

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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.