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Finding the Fourth Proportional to 315,222.78, 435,008.88 and 171,985.80

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Solution

The fourth proportional to 315,222.78, 435,008.88 and 171,985.80 is: 237,341.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,222.78 : 435,008.88 = 171,985.80 : x
  2. Step 2: Convert to fraction form
    315,222.78/435,008.88 = 171,985.80/x
  3. Step 3: Cross multiply
    315,222.78x = 435,008.88 × 171,985.80
  4. Step 4: Simplify right side
    315,222.78x = 74,815,350,233.90
  5. Step 5: Solve for x
    x = 74,815,350,233.90/315,222.78
  6. Step 6: Final answer
    x = 237,341.19

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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.