Home / 1,189,321.20-1,641,264.53-645,457.23

Finding the Fourth Proportional to 1,189,321.20, 1,641,264.53 and 645,457.23

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Solution

The fourth proportional to 1,189,321.20, 1,641,264.53 and 645,457.23 is: 890,731.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,321.20 : 1,641,264.53 = 645,457.23 : x
  2. Step 2: Convert to fraction form
    1,189,321.20/1,641,264.53 = 645,457.23/x
  3. Step 3: Cross multiply
    1,189,321.20x = 1,641,264.53 × 645,457.23
  4. Step 4: Simplify right side
    1,189,321.20x = 1,059,366,054,003.77
  5. Step 5: Solve for x
    x = 1,059,366,054,003.77/1,189,321.20
  6. Step 6: Final answer
    x = 890,731.67

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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.