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Finding the Fourth Proportional to 642,687.37, 964,709.45 and 628,211.14

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Solution

The fourth proportional to 642,687.37, 964,709.45 and 628,211.14 is: 942,979.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,687.37 : 964,709.45 = 628,211.14 : x
  2. Step 2: Convert to fraction form
    642,687.37/964,709.45 = 628,211.14/x
  3. Step 3: Cross multiply
    642,687.37x = 964,709.45 × 628,211.14
  4. Step 4: Simplify right side
    642,687.37x = 606,041,219,919.62
  5. Step 5: Solve for x
    x = 606,041,219,919.62/642,687.37
  6. Step 6: Final answer
    x = 942,979.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.