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Finding the Fourth Proportional to 352,729.08, 528,731.22 and 139,410.30

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Solution

The fourth proportional to 352,729.08, 528,731.22 and 139,410.30 is: 208,972.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,729.08 : 528,731.22 = 139,410.30 : x
  2. Step 2: Convert to fraction form
    352,729.08/528,731.22 = 139,410.30/x
  3. Step 3: Cross multiply
    352,729.08x = 528,731.22 × 139,410.30
  4. Step 4: Simplify right side
    352,729.08x = 73,710,577,999.57
  5. Step 5: Solve for x
    x = 73,710,577,999.57/352,729.08
  6. Step 6: Final answer
    x = 208,972.22

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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.