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Finding the Fourth Proportional to 628,529.31, 867,390.12 and 356,608.67

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Solution

The fourth proportional to 628,529.31, 867,390.12 and 356,608.67 is: 492,131.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,529.31 : 867,390.12 = 356,608.67 : x
  2. Step 2: Convert to fraction form
    628,529.31/867,390.12 = 356,608.67/x
  3. Step 3: Cross multiply
    628,529.31x = 867,390.12 × 356,608.67
  4. Step 4: Simplify right side
    628,529.31x = 309,318,832,727.39
  5. Step 5: Solve for x
    x = 309,318,832,727.39/628,529.31
  6. Step 6: Final answer
    x = 492,131.12

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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.