Home / 390,074.09-585,113.55-120,198.89

Finding the Fourth Proportional to 390,074.09, 585,113.55 and 120,198.89

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Solution

The fourth proportional to 390,074.09, 585,113.55 and 120,198.89 is: 180,299.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,074.09 : 585,113.55 = 120,198.89 : x
  2. Step 2: Convert to fraction form
    390,074.09/585,113.55 = 120,198.89/x
  3. Step 3: Cross multiply
    390,074.09x = 585,113.55 × 120,198.89
  4. Step 4: Simplify right side
    390,074.09x = 70,329,996,308.39
  5. Step 5: Solve for x
    x = 70,329,996,308.39/390,074.09
  6. Step 6: Final answer
    x = 180,299.07

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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.