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Finding the Fourth Proportional to 475,400.70, 655,761.44 and 388,312.34

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Solution

The fourth proportional to 475,400.70, 655,761.44 and 388,312.34 is: 535,632.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    475,400.70 : 655,761.44 = 388,312.34 : x
  2. Step 2: Convert to fraction form
    475,400.70/655,761.44 = 388,312.34/x
  3. Step 3: Cross multiply
    475,400.70x = 655,761.44 × 388,312.34
  4. Step 4: Simplify right side
    475,400.70x = 254,640,256,940.14
  5. Step 5: Solve for x
    x = 254,640,256,940.14/475,400.70
  6. Step 6: Final answer
    x = 535,632.90

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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.