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Finding the Fourth Proportional to 492,158.36, 678,866.46 and 310,553.12

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Solution

The fourth proportional to 492,158.36, 678,866.46 and 310,553.12 is: 428,366.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,158.36 : 678,866.46 = 310,553.12 : x
  2. Step 2: Convert to fraction form
    492,158.36/678,866.46 = 310,553.12/x
  3. Step 3: Cross multiply
    492,158.36x = 678,866.46 × 310,553.12
  4. Step 4: Simplify right side
    492,158.36x = 210,824,097,216.36
  5. Step 5: Solve for x
    x = 210,824,097,216.36/492,158.36
  6. Step 6: Final answer
    x = 428,366.38

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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.