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Finding the Fourth Proportional to 620,412.12, 856,189.49 and 344,781.59

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Solution

The fourth proportional to 620,412.12, 856,189.49 and 344,781.59 is: 475,810.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,412.12 : 856,189.49 = 344,781.59 : x
  2. Step 2: Convert to fraction form
    620,412.12/856,189.49 = 344,781.59/x
  3. Step 3: Cross multiply
    620,412.12x = 856,189.49 × 344,781.59
  4. Step 4: Simplify right side
    620,412.12x = 295,198,373,703.49
  5. Step 5: Solve for x
    x = 295,198,373,703.49/620,412.12
  6. Step 6: Final answer
    x = 475,810.13

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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.