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Finding the Fourth Proportional to 405,272.67, 607,921.30 and 139,029.35

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Solution

The fourth proportional to 405,272.67, 607,921.30 and 139,029.35 is: 208,548.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,272.67 : 607,921.30 = 139,029.35 : x
  2. Step 2: Convert to fraction form
    405,272.67/607,921.30 = 139,029.35/x
  3. Step 3: Cross multiply
    405,272.67x = 607,921.30 × 139,029.35
  4. Step 4: Simplify right side
    405,272.67x = 84,518,900,324.34
  5. Step 5: Solve for x
    x = 84,518,900,324.34/405,272.67
  6. Step 6: Final answer
    x = 208,548.24

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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.