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Finding the Fourth Proportional to 611,421.38, 843,720.37 and 339,475.22

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Solution

The fourth proportional to 611,421.38, 843,720.37 and 339,475.22 is: 468,452.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,421.38 : 843,720.37 = 339,475.22 : x
  2. Step 2: Convert to fraction form
    611,421.38/843,720.37 = 339,475.22/x
  3. Step 3: Cross multiply
    611,421.38x = 843,720.37 × 339,475.22
  4. Step 4: Simplify right side
    611,421.38x = 286,422,158,224.23
  5. Step 5: Solve for x
    x = 286,422,158,224.23/611,421.38
  6. Step 6: Final answer
    x = 468,452.96

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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.