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Finding the Fourth Proportional to 621,380.83, 857,430.20 and 345,673.51

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Solution

The fourth proportional to 621,380.83, 857,430.20 and 345,673.51 is: 476,987.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,380.83 : 857,430.20 = 345,673.51 : x
  2. Step 2: Convert to fraction form
    621,380.83/857,430.20 = 345,673.51/x
  3. Step 3: Cross multiply
    621,380.83x = 857,430.20 × 345,673.51
  4. Step 4: Simplify right side
    621,380.83x = 296,390,906,814.00
  5. Step 5: Solve for x
    x = 296,390,906,814.00/621,380.83
  6. Step 6: Final answer
    x = 476,987.53

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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.