Home / 745,418.70-1,028,415.51-487,446.66

Finding the Fourth Proportional to 745,418.70, 1,028,415.51 and 487,446.66

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Solution

The fourth proportional to 745,418.70, 1,028,415.51 and 487,446.66 is: 672,504.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,418.70 : 1,028,415.51 = 487,446.66 : x
  2. Step 2: Convert to fraction form
    745,418.70/1,028,415.51 = 487,446.66/x
  3. Step 3: Cross multiply
    745,418.70x = 1,028,415.51 × 487,446.66
  4. Step 4: Simplify right side
    745,418.70x = 501,297,705,441.70
  5. Step 5: Solve for x
    x = 501,297,705,441.70/745,418.70
  6. Step 6: Final answer
    x = 672,504.87

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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.