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Finding the Fourth Proportional to 355,659.72, 490,988.70 and 274,904.76

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Solution

The fourth proportional to 355,659.72, 490,988.70 and 274,904.76 is: 379,506.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,659.72 : 490,988.70 = 274,904.76 : x
  2. Step 2: Convert to fraction form
    355,659.72/490,988.70 = 274,904.76/x
  3. Step 3: Cross multiply
    355,659.72x = 490,988.70 × 274,904.76
  4. Step 4: Simplify right side
    355,659.72x = 134,975,130,736.21
  5. Step 5: Solve for x
    x = 134,975,130,736.21/355,659.72
  6. Step 6: Final answer
    x = 379,506.37

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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.