Home / 805,894.80-1,207,384.20-638,516.40

Finding the Fourth Proportional to 805,894.80, 1,207,384.20 and 638,516.40

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Solution

The fourth proportional to 805,894.80, 1,207,384.20 and 638,516.40 is: 956,619.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,894.80 : 1,207,384.20 = 638,516.40 : x
  2. Step 2: Convert to fraction form
    805,894.80/1,207,384.20 = 638,516.40/x
  3. Step 3: Cross multiply
    805,894.80x = 1,207,384.20 × 638,516.40
  4. Step 4: Simplify right side
    805,894.80x = 770,934,612,800.88
  5. Step 5: Solve for x
    x = 770,934,612,800.88/805,894.80
  6. Step 6: Final answer
    x = 956,619.42

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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.