Home / 870,990.12-1,306,265.94-309,893.40

Finding the Fourth Proportional to 870,990.12, 1,306,265.94 and 309,893.40

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Solution

The fourth proportional to 870,990.12, 1,306,265.94 and 309,893.40 is: 464,762.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,990.12 : 1,306,265.94 = 309,893.40 : x
  2. Step 2: Convert to fraction form
    870,990.12/1,306,265.94 = 309,893.40/x
  3. Step 3: Cross multiply
    870,990.12x = 1,306,265.94 × 309,893.40
  4. Step 4: Simplify right side
    870,990.12x = 404,803,193,450.80
  5. Step 5: Solve for x
    x = 404,803,193,450.80/870,990.12
  6. Step 6: Final answer
    x = 464,762.10

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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.