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Finding the Fourth Proportional to 642,958.40, 964,490.19 and 322,945.72

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Solution

The fourth proportional to 642,958.40, 964,490.19 and 322,945.72 is: 484,444.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,958.40 : 964,490.19 = 322,945.72 : x
  2. Step 2: Convert to fraction form
    642,958.40/964,490.19 = 322,945.72/x
  3. Step 3: Cross multiply
    642,958.40x = 964,490.19 × 322,945.72
  4. Step 4: Simplify right side
    642,958.40x = 311,477,978,842.49
  5. Step 5: Solve for x
    x = 311,477,978,842.49/642,958.40
  6. Step 6: Final answer
    x = 484,444.99

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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.