Home / 810,470.76-1,215,706.14-305,145.12

Finding the Fourth Proportional to 810,470.76, 1,215,706.14 and 305,145.12

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Solution

The fourth proportional to 810,470.76, 1,215,706.14 and 305,145.12 is: 457,717.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,470.76 : 1,215,706.14 = 305,145.12 : x
  2. Step 2: Convert to fraction form
    810,470.76/1,215,706.14 = 305,145.12/x
  3. Step 3: Cross multiply
    810,470.76x = 1,215,706.14 × 305,145.12
  4. Step 4: Simplify right side
    810,470.76x = 370,966,801,392.16
  5. Step 5: Solve for x
    x = 370,966,801,392.16/810,470.76
  6. Step 6: Final answer
    x = 457,717.69

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.