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Finding the Fourth Proportional to 1,315,581.06, 1,973,371.67 and 318,309.06

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Solution

The fourth proportional to 1,315,581.06, 1,973,371.67 and 318,309.06 is: 477,463.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,581.06 : 1,973,371.67 = 318,309.06 : x
  2. Step 2: Convert to fraction form
    1,315,581.06/1,973,371.67 = 318,309.06/x
  3. Step 3: Cross multiply
    1,315,581.06x = 1,973,371.67 × 318,309.06
  4. Step 4: Simplify right side
    1,315,581.06x = 628,142,081,308.33
  5. Step 5: Solve for x
    x = 628,142,081,308.33/1,315,581.06
  6. Step 6: Final answer
    x = 477,463.61

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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.