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Finding the Fourth Proportional to 638,588.40, 957,709.80 and 189,308.40

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Solution

The fourth proportional to 638,588.40, 957,709.80 and 189,308.40 is: 283,911.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,588.40 : 957,709.80 = 189,308.40 : x
  2. Step 2: Convert to fraction form
    638,588.40/957,709.80 = 189,308.40/x
  3. Step 3: Cross multiply
    638,588.40x = 957,709.80 × 189,308.40
  4. Step 4: Simplify right side
    638,588.40x = 181,302,509,902.32
  5. Step 5: Solve for x
    x = 181,302,509,902.32/638,588.40
  6. Step 6: Final answer
    x = 283,911.37

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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.