Home / 812,956.80-1,121,865.18-490,680.48

Finding the Fourth Proportional to 812,956.80, 1,121,865.18 and 490,680.48

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Solution

The fourth proportional to 812,956.80, 1,121,865.18 and 490,680.48 is: 677,129.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,956.80 : 1,121,865.18 = 490,680.48 : x
  2. Step 2: Convert to fraction form
    812,956.80/1,121,865.18 = 490,680.48/x
  3. Step 3: Cross multiply
    812,956.80x = 1,121,865.18 × 490,680.48
  4. Step 4: Simplify right side
    812,956.80x = 550,477,345,017.69
  5. Step 5: Solve for x
    x = 550,477,345,017.69/812,956.80
  6. Step 6: Final answer
    x = 677,129.89

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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.