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Finding the Fourth Proportional to 438,571.17, 657,880.08 and 139,075.38

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Solution

The fourth proportional to 438,571.17, 657,880.08 and 139,075.38 is: 208,620.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,571.17 : 657,880.08 = 139,075.38 : x
  2. Step 2: Convert to fraction form
    438,571.17/657,880.08 = 139,075.38/x
  3. Step 3: Cross multiply
    438,571.17x = 657,880.08 × 139,075.38
  4. Step 4: Simplify right side
    438,571.17x = 91,494,922,120.43
  5. Step 5: Solve for x
    x = 91,494,922,120.43/438,571.17
  6. Step 6: Final answer
    x = 208,620.47

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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.