Home / 1,211,152.80-1,820,665.80-858,608.40

Finding the Fourth Proportional to 1,211,152.80, 1,820,665.80 and 858,608.40

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Solution

The fourth proportional to 1,211,152.80, 1,820,665.80 and 858,608.40 is: 1,290,703.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,152.80 : 1,820,665.80 = 858,608.40 : x
  2. Step 2: Convert to fraction form
    1,211,152.80/1,820,665.80 = 858,608.40/x
  3. Step 3: Cross multiply
    1,211,152.80x = 1,820,665.80 × 858,608.40
  4. Step 4: Simplify right side
    1,211,152.80x = 1,563,238,949,472.72
  5. Step 5: Solve for x
    x = 1,563,238,949,472.72/1,211,152.80
  6. Step 6: Final answer
    x = 1,290,703.33

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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.