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Finding the Fourth Proportional to 879,647.40, 1,319,471.10 and 864,095.40

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Solution

The fourth proportional to 879,647.40, 1,319,471.10 and 864,095.40 is: 1,296,143.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,647.40 : 1,319,471.10 = 864,095.40 : x
  2. Step 2: Convert to fraction form
    879,647.40/1,319,471.10 = 864,095.40/x
  3. Step 3: Cross multiply
    879,647.40x = 1,319,471.10 × 864,095.40
  4. Step 4: Simplify right side
    879,647.40x = 1,140,148,907,942.94
  5. Step 5: Solve for x
    x = 1,140,148,907,942.94/879,647.40
  6. Step 6: Final answer
    x = 1,296,143.10

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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.