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Finding the Fourth Proportional to 388,858.40, 583,287.60 and 231,005.60

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Solution

The fourth proportional to 388,858.40, 583,287.60 and 231,005.60 is: 346,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,858.40 : 583,287.60 = 231,005.60 : x
  2. Step 2: Convert to fraction form
    388,858.40/583,287.60 = 231,005.60/x
  3. Step 3: Cross multiply
    388,858.40x = 583,287.60 × 231,005.60
  4. Step 4: Simplify right side
    388,858.40x = 134,742,702,010.56
  5. Step 5: Solve for x
    x = 134,742,702,010.56/388,858.40
  6. Step 6: Final answer
    x = 346,508.40

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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.