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Finding the Fourth Proportional to 628,515.12, 867,370.54 and 356,594.48

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Solution

The fourth proportional to 628,515.12, 867,370.54 and 356,594.48 is: 492,111.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,515.12 : 867,370.54 = 356,594.48 : x
  2. Step 2: Convert to fraction form
    628,515.12/867,370.54 = 356,594.48/x
  3. Step 3: Cross multiply
    628,515.12x = 867,370.54 × 356,594.48
  4. Step 4: Simplify right side
    628,515.12x = 309,299,546,678.62
  5. Step 5: Solve for x
    x = 309,299,546,678.62/628,515.12
  6. Step 6: Final answer
    x = 492,111.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.