Home / 990,992.85-1,486,169.40-280,830.21

Finding the Fourth Proportional to 990,992.85, 1,486,169.40 and 280,830.21

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Solution

The fourth proportional to 990,992.85, 1,486,169.40 and 280,830.21 is: 421,154.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,992.85 : 1,486,169.40 = 280,830.21 : x
  2. Step 2: Convert to fraction form
    990,992.85/1,486,169.40 = 280,830.21/x
  3. Step 3: Cross multiply
    990,992.85x = 1,486,169.40 × 280,830.21
  4. Step 4: Simplify right side
    990,992.85x = 417,361,264,697.57
  5. Step 5: Solve for x
    x = 417,361,264,697.57/990,992.85
  6. Step 6: Final answer
    x = 421,154.67

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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.