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Finding the Fourth Proportional to 655,448.31, 904,535.78 and 368,978.85

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Solution

The fourth proportional to 655,448.31, 904,535.78 and 368,978.85 is: 509,200.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,448.31 : 904,535.78 = 368,978.85 : x
  2. Step 2: Convert to fraction form
    655,448.31/904,535.78 = 368,978.85/x
  3. Step 3: Cross multiply
    655,448.31x = 904,535.78 × 368,978.85
  4. Step 4: Simplify right side
    655,448.31x = 333,754,570,043.36
  5. Step 5: Solve for x
    x = 333,754,570,043.36/655,448.31
  6. Step 6: Final answer
    x = 509,200.44

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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.