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Finding the Fourth Proportional to 655,555.15, 904,696.73 and 397,440.15

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Solution

The fourth proportional to 655,555.15, 904,696.73 and 397,440.15 is: 548,485.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,555.15 : 904,696.73 = 397,440.15 : x
  2. Step 2: Convert to fraction form
    655,555.15/904,696.73 = 397,440.15/x
  3. Step 3: Cross multiply
    655,555.15x = 904,696.73 × 397,440.15
  4. Step 4: Simplify right side
    655,555.15x = 359,562,804,075.71
  5. Step 5: Solve for x
    x = 359,562,804,075.71/655,555.15
  6. Step 6: Final answer
    x = 548,485.97

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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.