Home / 438,311.20-657,488.40-228,359.20

Finding the Fourth Proportional to 438,311.20, 657,488.40 and 228,359.20

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Solution

The fourth proportional to 438,311.20, 657,488.40 and 228,359.20 is: 342,550.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,311.20 : 657,488.40 = 228,359.20 : x
  2. Step 2: Convert to fraction form
    438,311.20/657,488.40 = 228,359.20/x
  3. Step 3: Cross multiply
    438,311.20x = 657,488.40 × 228,359.20
  4. Step 4: Simplify right side
    438,311.20x = 150,143,525,033.28
  5. Step 5: Solve for x
    x = 150,143,525,033.28/438,311.20
  6. Step 6: Final answer
    x = 342,550.05

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1.5x scale

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.