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Finding the Fourth Proportional to 661,643.56, 992,316.30 and 188,318.44

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Solution

The fourth proportional to 661,643.56, 992,316.30 and 188,318.44 is: 282,435.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,643.56 : 992,316.30 = 188,318.44 : x
  2. Step 2: Convert to fraction form
    661,643.56/992,316.30 = 188,318.44/x
  3. Step 3: Cross multiply
    661,643.56x = 992,316.30 × 188,318.44
  4. Step 4: Simplify right side
    661,643.56x = 186,871,457,602.57
  5. Step 5: Solve for x
    x = 186,871,457,602.57/661,643.56
  6. Step 6: Final answer
    x = 282,435.24

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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.