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Finding the Fourth Proportional to 418,313.61, 627,485.13 and 134,012.79

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Solution

The fourth proportional to 418,313.61, 627,485.13 and 134,012.79 is: 201,023.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,313.61 : 627,485.13 = 134,012.79 : x
  2. Step 2: Convert to fraction form
    418,313.61/627,485.13 = 134,012.79/x
  3. Step 3: Cross multiply
    418,313.61x = 627,485.13 × 134,012.79
  4. Step 4: Simplify right side
    418,313.61x = 84,091,032,954.81
  5. Step 5: Solve for x
    x = 84,091,032,954.81/418,313.61
  6. Step 6: Final answer
    x = 201,023.90

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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.