Home / 812,358.96-1,219,238.40-391,988.40

Finding the Fourth Proportional to 812,358.96, 1,219,238.40 and 391,988.40

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Solution

The fourth proportional to 812,358.96, 1,219,238.40 and 391,988.40 is: 588,320.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,358.96 : 1,219,238.40 = 391,988.40 : x
  2. Step 2: Convert to fraction form
    812,358.96/1,219,238.40 = 391,988.40/x
  3. Step 3: Cross multiply
    812,358.96x = 1,219,238.40 × 391,988.40
  4. Step 4: Simplify right side
    812,358.96x = 477,927,309,634.56
  5. Step 5: Solve for x
    x = 477,927,309,634.56/812,358.96
  6. Step 6: Final answer
    x = 588,320.35

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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.