Home / 1,189,155.90-1,783,065.20-390,370.49

Finding the Fourth Proportional to 1,189,155.90, 1,783,065.20 and 390,370.49

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Solution

The fourth proportional to 1,189,155.90, 1,783,065.20 and 390,370.49 is: 585,336.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,155.90 : 1,783,065.20 = 390,370.49 : x
  2. Step 2: Convert to fraction form
    1,189,155.90/1,783,065.20 = 390,370.49/x
  3. Step 3: Cross multiply
    1,189,155.90x = 1,783,065.20 × 390,370.49
  4. Step 4: Simplify right side
    1,189,155.90x = 696,056,024,958.77
  5. Step 5: Solve for x
    x = 696,056,024,958.77/1,189,155.90
  6. Step 6: Final answer
    x = 585,336.22

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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.