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Finding the Fourth Proportional to 628,868.70, 867,917.19 and 357,024.60

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Solution

The fourth proportional to 628,868.70, 867,917.19 and 357,024.60 is: 492,738.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,868.70 : 867,917.19 = 357,024.60 : x
  2. Step 2: Convert to fraction form
    628,868.70/867,917.19 = 357,024.60/x
  3. Step 3: Cross multiply
    628,868.70x = 867,917.19 × 357,024.60
  4. Step 4: Simplify right side
    628,868.70x = 309,867,787,592.87
  5. Step 5: Solve for x
    x = 309,867,787,592.87/628,868.70
  6. Step 6: Final answer
    x = 492,738.45

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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.