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Finding the Fourth Proportional to 621,379.83, 857,428.82 and 345,672.51

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Solution

The fourth proportional to 621,379.83, 857,428.82 and 345,672.51 is: 476,986.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,379.83 : 857,428.82 = 345,672.51 : x
  2. Step 2: Convert to fraction form
    621,379.83/857,428.82 = 345,672.51/x
  3. Step 3: Cross multiply
    621,379.83x = 857,428.82 × 345,672.51
  4. Step 4: Simplify right side
    621,379.83x = 296,389,572,355.74
  5. Step 5: Solve for x
    x = 296,389,572,355.74/621,379.83
  6. Step 6: Final answer
    x = 476,986.15

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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.