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Finding the Fourth Proportional to 620,315.28, 855,971.04 and 348,412.80

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Solution

The fourth proportional to 620,315.28, 855,971.04 and 348,412.80 is: 480,773.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,315.28 : 855,971.04 = 348,412.80 : x
  2. Step 2: Convert to fraction form
    620,315.28/855,971.04 = 348,412.80/x
  3. Step 3: Cross multiply
    620,315.28x = 855,971.04 × 348,412.80
  4. Step 4: Simplify right side
    620,315.28x = 298,231,266,765.31
  5. Step 5: Solve for x
    x = 298,231,266,765.31/620,315.28
  6. Step 6: Final answer
    x = 480,773.69

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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.