Home / 1,189,420.04-1,641,401.20-645,555.77

Finding the Fourth Proportional to 1,189,420.04, 1,641,401.20 and 645,555.77

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Solution

The fourth proportional to 1,189,420.04, 1,641,401.20 and 645,555.77 is: 890,867.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,420.04 : 1,641,401.20 = 645,555.77 : x
  2. Step 2: Convert to fraction form
    1,189,420.04/1,641,401.20 = 645,555.77/x
  3. Step 3: Cross multiply
    1,189,420.04x = 1,641,401.20 × 645,555.77
  4. Step 4: Simplify right side
    1,189,420.04x = 1,059,616,010,668.87
  5. Step 5: Solve for x
    x = 1,059,616,010,668.87/1,189,420.04
  6. Step 6: Final answer
    x = 890,867.80

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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.