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Finding the Fourth Proportional to 315,401.20, 435,263.97 and 172,168.90

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Solution

The fourth proportional to 315,401.20, 435,263.97 and 172,168.90 is: 237,598.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,401.20 : 435,263.97 = 172,168.90 : x
  2. Step 2: Convert to fraction form
    315,401.20/435,263.97 = 172,168.90/x
  3. Step 3: Cross multiply
    315,401.20x = 435,263.97 × 172,168.90
  4. Step 4: Simplify right side
    315,401.20x = 74,938,918,924.53
  5. Step 5: Solve for x
    x = 74,938,918,924.53/315,401.20
  6. Step 6: Final answer
    x = 237,598.71

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1.5x scale

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.