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Finding the Fourth Proportional to 628,870.70, 867,919.95 and 357,026.60

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Solution

The fourth proportional to 628,870.70, 867,919.95 and 357,026.60 is: 492,741.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,870.70 : 867,919.95 = 357,026.60 : x
  2. Step 2: Convert to fraction form
    628,870.70/867,919.95 = 357,026.60/x
  3. Step 3: Cross multiply
    628,870.70x = 867,919.95 × 357,026.60
  4. Step 4: Simplify right side
    628,870.70x = 309,870,504,481.07
  5. Step 5: Solve for x
    x = 309,870,504,481.07/628,870.70
  6. Step 6: Final answer
    x = 492,741.21

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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.