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Finding the Fourth Proportional to 315,803.79, 435,803.97 and 172,560.54

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Solution

The fourth proportional to 315,803.79, 435,803.97 and 172,560.54 is: 238,130.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,803.79 : 435,803.97 = 172,560.54 : x
  2. Step 2: Convert to fraction form
    315,803.79/435,803.97 = 172,560.54/x
  3. Step 3: Cross multiply
    315,803.79x = 435,803.97 × 172,560.54
  4. Step 4: Simplify right side
    315,803.79x = 75,202,568,397.34
  5. Step 5: Solve for x
    x = 75,202,568,397.34/315,803.79
  6. Step 6: Final answer
    x = 238,130.67

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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.