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Finding the Fourth Proportional to 388,240.88, 582,386.43 and 122,012.51

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Solution

The fourth proportional to 388,240.88, 582,386.43 and 122,012.51 is: 183,026.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,240.88 : 582,386.43 = 122,012.51 : x
  2. Step 2: Convert to fraction form
    388,240.88/582,386.43 = 122,012.51/x
  3. Step 3: Cross multiply
    388,240.88x = 582,386.43 × 122,012.51
  4. Step 4: Simplify right side
    388,240.88x = 71,058,430,114.24
  5. Step 5: Solve for x
    x = 71,058,430,114.24/388,240.88
  6. Step 6: Final answer
    x = 183,026.66

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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.