Home / 728,438.20-1,005,257.18-401,788.72

Finding the Fourth Proportional to 728,438.20, 1,005,257.18 and 401,788.72

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Solution

The fourth proportional to 728,438.20, 1,005,257.18 and 401,788.72 is: 554,475.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,438.20 : 1,005,257.18 = 401,788.72 : x
  2. Step 2: Convert to fraction form
    728,438.20/1,005,257.18 = 401,788.72/x
  3. Step 3: Cross multiply
    728,438.20x = 1,005,257.18 × 401,788.72
  4. Step 4: Simplify right side
    728,438.20x = 403,900,997,884.05
  5. Step 5: Solve for x
    x = 403,900,997,884.05/728,438.20
  6. Step 6: Final answer
    x = 554,475.31

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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.