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Finding the Fourth Proportional to 667,382.37, 920,249.69 and 425,281.47

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Solution

The fourth proportional to 667,382.37, 920,249.69 and 425,281.47 is: 586,418.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,382.37 : 920,249.69 = 425,281.47 : x
  2. Step 2: Convert to fraction form
    667,382.37/920,249.69 = 425,281.47/x
  3. Step 3: Cross multiply
    667,382.37x = 920,249.69 × 425,281.47
  4. Step 4: Simplify right side
    667,382.37x = 391,365,141,993.45
  5. Step 5: Solve for x
    x = 391,365,141,993.45/667,382.37
  6. Step 6: Final answer
    x = 586,418.16

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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.