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Finding the Fourth Proportional to 499,289.90, 748,959.15 and 139,460.36

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Solution

The fourth proportional to 499,289.90, 748,959.15 and 139,460.36 is: 209,197.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,289.90 : 748,959.15 = 139,460.36 : x
  2. Step 2: Convert to fraction form
    499,289.90/748,959.15 = 139,460.36/x
  3. Step 3: Cross multiply
    499,289.90x = 748,959.15 × 139,460.36
  4. Step 4: Simplify right side
    499,289.90x = 104,450,112,684.29
  5. Step 5: Solve for x
    x = 104,450,112,684.29/499,289.90
  6. Step 6: Final answer
    x = 209,197.33

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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.