Home / 309,241.28-423,555.40-291,084.32

Finding the Fourth Proportional to 309,241.28, 423,555.40 and 291,084.32

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Solution

The fourth proportional to 309,241.28, 423,555.40 and 291,084.32 is: 398,686.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,241.28 : 423,555.40 = 291,084.32 : x
  2. Step 2: Convert to fraction form
    309,241.28/423,555.40 = 291,084.32/x
  3. Step 3: Cross multiply
    309,241.28x = 423,555.40 × 291,084.32
  4. Step 4: Simplify right side
    309,241.28x = 123,290,335,591.33
  5. Step 5: Solve for x
    x = 123,290,335,591.33/309,241.28
  6. Step 6: Final answer
    x = 398,686.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.