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Finding the Fourth Proportional to 486,978.56, 672,457.92 and 306,004.08

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Solution

The fourth proportional to 486,978.56, 672,457.92 and 306,004.08 is: 422,554.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,978.56 : 672,457.92 = 306,004.08 : x
  2. Step 2: Convert to fraction form
    486,978.56/672,457.92 = 306,004.08/x
  3. Step 3: Cross multiply
    486,978.56x = 672,457.92 × 306,004.08
  4. Step 4: Simplify right side
    486,978.56x = 205,774,867,148.31
  5. Step 5: Solve for x
    x = 205,774,867,148.31/486,978.56
  6. Step 6: Final answer
    x = 422,554.26

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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.