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Finding the Fourth Proportional to 315,270.60, 435,083.93 and 172,038.51

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Solution

The fourth proportional to 315,270.60, 435,083.93 and 172,038.51 is: 237,418.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,270.60 : 435,083.93 = 172,038.51 : x
  2. Step 2: Convert to fraction form
    315,270.60/435,083.93 = 172,038.51/x
  3. Step 3: Cross multiply
    315,270.60x = 435,083.93 × 172,038.51
  4. Step 4: Simplify right side
    315,270.60x = 74,851,190,181.95
  5. Step 5: Solve for x
    x = 74,851,190,181.95/315,270.60
  6. Step 6: Final answer
    x = 237,418.87

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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.