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Finding the Fourth Proportional to 1,105,308, 1,525,325.10 and 628,380

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Solution

The fourth proportional to 1,105,308, 1,525,325.10 and 628,380 is: 867,164.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105,308 : 1,525,325.10 = 628,380 : x
  2. Step 2: Convert to fraction form
    1,105,308/1,525,325.10 = 628,380/x
  3. Step 3: Cross multiply
    1,105,308x = 1,525,325.10 × 628,380
  4. Step 4: Simplify right side
    1,105,308x = 958,483,786,338
  5. Step 5: Solve for x
    x = 958,483,786,338/1,105,308
  6. Step 6: Final answer
    x = 867,164.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.