Home / 1,210,823.80-1,820,172.30-858,279.40

Finding the Fourth Proportional to 1,210,823.80, 1,820,172.30 and 858,279.40

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Solution

The fourth proportional to 1,210,823.80, 1,820,172.30 and 858,279.40 is: 1,290,209.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,823.80 : 1,820,172.30 = 858,279.40 : x
  2. Step 2: Convert to fraction form
    1,210,823.80/1,820,172.30 = 858,279.40/x
  3. Step 3: Cross multiply
    1,210,823.80x = 1,820,172.30 × 858,279.40
  4. Step 4: Simplify right side
    1,210,823.80x = 1,562,216,389,540.62
  5. Step 5: Solve for x
    x = 1,562,216,389,540.62/1,210,823.80
  6. Step 6: Final answer
    x = 1,290,209.52

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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.