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Finding the Fourth Proportional to 538,736.67, 808,038.99 and 139,344.30

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Solution

The fourth proportional to 538,736.67, 808,038.99 and 139,344.30 is: 208,999.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,736.67 : 808,038.99 = 139,344.30 : x
  2. Step 2: Convert to fraction form
    538,736.67/808,038.99 = 139,344.30/x
  3. Step 3: Cross multiply
    538,736.67x = 808,038.99 × 139,344.30
  4. Step 4: Simplify right side
    538,736.67x = 112,595,627,434.26
  5. Step 5: Solve for x
    x = 112,595,627,434.26/538,736.67
  6. Step 6: Final answer
    x = 208,999.38

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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.