Home / 849,881.80-1,274,976.30-428,096.20

Finding the Fourth Proportional to 849,881.80, 1,274,976.30 and 428,096.20

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Solution

The fourth proportional to 849,881.80, 1,274,976.30 and 428,096.20 is: 642,221.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    849,881.80 : 1,274,976.30 = 428,096.20 : x
  2. Step 2: Convert to fraction form
    849,881.80/1,274,976.30 = 428,096.20/x
  3. Step 3: Cross multiply
    849,881.80x = 1,274,976.30 × 428,096.20
  4. Step 4: Simplify right side
    849,881.80x = 545,812,509,120.06
  5. Step 5: Solve for x
    x = 545,812,509,120.06/849,881.80
  6. Step 6: Final answer
    x = 642,221.67

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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.