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Finding the Fourth Proportional to 7,421,806.45, 10,405,458.95 and 7,421,806.45

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Solution

The fourth proportional to 7,421,806.45, 10,405,458.95 and 7,421,806.45 is: 10,405,458.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421,806.45 : 10,405,458.95 = 7,421,806.45 : x
  2. Step 2: Convert to fraction form
    7,421,806.45/10,405,458.95 = 7,421,806.45/x
  3. Step 3: Cross multiply
    7,421,806.45x = 10,405,458.95 × 7,421,806.45
  4. Step 4: Simplify right side
    7,421,806.45x = 77,227,302,350,320.22
  5. Step 5: Solve for x
    x = 77,227,302,350,320.22/7,421,806.45
  6. Step 6: Final answer
    x = 10,405,458.95

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.