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Finding the Fourth Proportional to 296,639.40, 445,104.90 and 138,840.60

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Solution

The fourth proportional to 296,639.40, 445,104.90 and 138,840.60 is: 208,329.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,639.40 : 445,104.90 = 138,840.60 : x
  2. Step 2: Convert to fraction form
    296,639.40/445,104.90 = 138,840.60/x
  3. Step 3: Cross multiply
    296,639.40x = 445,104.90 × 138,840.60
  4. Step 4: Simplify right side
    296,639.40x = 61,798,631,378.94
  5. Step 5: Solve for x
    x = 61,798,631,378.94/296,639.40
  6. Step 6: Final answer
    x = 208,329.14

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1.5x scale

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.