Home / 820,111.20-1,230,166.80-689,474.40

Finding the Fourth Proportional to 820,111.20, 1,230,166.80 and 689,474.40

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Solution

The fourth proportional to 820,111.20, 1,230,166.80 and 689,474.40 is: 1,034,211.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,111.20 : 1,230,166.80 = 689,474.40 : x
  2. Step 2: Convert to fraction form
    820,111.20/1,230,166.80 = 689,474.40/x
  3. Step 3: Cross multiply
    820,111.20x = 1,230,166.80 × 689,474.40
  4. Step 4: Simplify right side
    820,111.20x = 848,168,516,329.92
  5. Step 5: Solve for x
    x = 848,168,516,329.92/820,111.20
  6. Step 6: Final answer
    x = 1,034,211.60

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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.