Home / 1,270,720.18-1,905,657.40-512,365.78

Finding the Fourth Proportional to 1,270,720.18, 1,905,657.40 and 512,365.78

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Solution

The fourth proportional to 1,270,720.18, 1,905,657.40 and 512,365.78 is: 768,378.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270,720.18 : 1,905,657.40 = 512,365.78 : x
  2. Step 2: Convert to fraction form
    1,270,720.18/1,905,657.40 = 512,365.78/x
  3. Step 3: Cross multiply
    1,270,720.18x = 1,905,657.40 × 512,365.78
  4. Step 4: Simplify right side
    1,270,720.18x = 976,393,640,163.77
  5. Step 5: Solve for x
    x = 976,393,640,163.77/1,270,720.18
  6. Step 6: Final answer
    x = 768,378.17

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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.