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Finding the Fourth Proportional to 315,903.06, 435,695.37 and 238,636.53

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Solution

The fourth proportional to 315,903.06, 435,695.37 and 238,636.53 is: 329,128.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,903.06 : 435,695.37 = 238,636.53 : x
  2. Step 2: Convert to fraction form
    315,903.06/435,695.37 = 238,636.53/x
  3. Step 3: Cross multiply
    315,903.06x = 435,695.37 × 238,636.53
  4. Step 4: Simplify right side
    315,903.06x = 103,972,831,233.87
  5. Step 5: Solve for x
    x = 103,972,831,233.87/315,903.06
  6. Step 6: Final answer
    x = 329,128.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.