Home / 305,312.28-421,538.76-190,635.72

Finding the Fourth Proportional to 305,312.28, 421,538.76 and 190,635.72

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Solution

The fourth proportional to 305,312.28, 421,538.76 and 190,635.72 is: 263,207.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,312.28 : 421,538.76 = 190,635.72 : x
  2. Step 2: Convert to fraction form
    305,312.28/421,538.76 = 190,635.72/x
  3. Step 3: Cross multiply
    305,312.28x = 421,538.76 × 190,635.72
  4. Step 4: Simplify right side
    305,312.28x = 80,360,345,020.51
  5. Step 5: Solve for x
    x = 80,360,345,020.51/305,312.28
  6. Step 6: Final answer
    x = 263,207.05

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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.