Home / 438,309.20-657,485.40-228,357.20

Finding the Fourth Proportional to 438,309.20, 657,485.40 and 228,357.20

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Solution

The fourth proportional to 438,309.20, 657,485.40 and 228,357.20 is: 342,547.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,309.20 : 657,485.40 = 228,357.20 : x
  2. Step 2: Convert to fraction form
    438,309.20/657,485.40 = 228,357.20/x
  3. Step 3: Cross multiply
    438,309.20x = 657,485.40 × 228,357.20
  4. Step 4: Simplify right side
    438,309.20x = 150,141,524,984.88
  5. Step 5: Solve for x
    x = 150,141,524,984.88/438,309.20
  6. Step 6: Final answer
    x = 342,547.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.