Home / 309,240.28-423,554.03-291,083.32

Finding the Fourth Proportional to 309,240.28, 423,554.03 and 291,083.32

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Solution

The fourth proportional to 309,240.28, 423,554.03 and 291,083.32 is: 398,685.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,240.28 : 423,554.03 = 291,083.32 : x
  2. Step 2: Convert to fraction form
    309,240.28/423,554.03 = 291,083.32/x
  3. Step 3: Cross multiply
    309,240.28x = 423,554.03 × 291,083.32
  4. Step 4: Simplify right side
    309,240.28x = 123,289,513,251.78
  5. Step 5: Solve for x
    x = 123,289,513,251.78/309,240.28
  6. Step 6: Final answer
    x = 398,685.17

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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.