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Finding the Fourth Proportional to 315,795.68, 435,792.84 and 172,552.64

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Solution

The fourth proportional to 315,795.68, 435,792.84 and 172,552.64 is: 238,119.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,795.68 : 435,792.84 = 172,552.64 : x
  2. Step 2: Convert to fraction form
    315,795.68/435,792.84 = 172,552.64/x
  3. Step 3: Cross multiply
    315,795.68x = 435,792.84 × 172,552.64
  4. Step 4: Simplify right side
    315,795.68x = 75,197,205,035.10
  5. Step 5: Solve for x
    x = 75,197,205,035.10/315,795.68
  6. Step 6: Final answer
    x = 238,119.80

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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.