Home / 431,420.40-643,936.68-404,826.48

Finding the Fourth Proportional to 431,420.40, 643,936.68 and 404,826.48

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Solution

The fourth proportional to 431,420.40, 643,936.68 and 404,826.48 is: 604,242.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,420.40 : 643,936.68 = 404,826.48 : x
  2. Step 2: Convert to fraction form
    431,420.40/643,936.68 = 404,826.48/x
  3. Step 3: Cross multiply
    431,420.40x = 643,936.68 × 404,826.48
  4. Step 4: Simplify right side
    431,420.40x = 260,682,619,507.29
  5. Step 5: Solve for x
    x = 260,682,619,507.29/431,420.40
  6. Step 6: Final answer
    x = 604,242.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.