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Finding the Fourth Proportional to 628,160.70, 867,015.74 and 356,387.67

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Solution

The fourth proportional to 628,160.70, 867,015.74 and 356,387.67 is: 491,902.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,160.70 : 867,015.74 = 356,387.67 : x
  2. Step 2: Convert to fraction form
    628,160.70/867,015.74 = 356,387.67/x
  3. Step 3: Cross multiply
    628,160.70x = 867,015.74 × 356,387.67
  4. Step 4: Simplify right side
    628,160.70x = 308,993,717,649.99
  5. Step 5: Solve for x
    x = 308,993,717,649.99/628,160.70
  6. Step 6: Final answer
    x = 491,902.34

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1.5x scale

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.