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Finding the Fourth Proportional to 538,398.06, 807,534.56 and 139,007.45

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Solution

The fourth proportional to 538,398.06, 807,534.56 and 139,007.45 is: 208,495.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,398.06 : 807,534.56 = 139,007.45 : x
  2. Step 2: Convert to fraction form
    538,398.06/807,534.56 = 139,007.45/x
  3. Step 3: Cross multiply
    538,398.06x = 807,534.56 × 139,007.45
  4. Step 4: Simplify right side
    538,398.06x = 112,253,315,239.76
  5. Step 5: Solve for x
    x = 112,253,315,239.76/538,398.06
  6. Step 6: Final answer
    x = 208,495.02

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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.