Home / 420,313.74-630,655.44-220,587.33

Finding the Fourth Proportional to 420,313.74, 630,655.44 and 220,587.33

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Solution

The fourth proportional to 420,313.74, 630,655.44 and 220,587.33 is: 330,978.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,313.74 : 630,655.44 = 220,587.33 : x
  2. Step 2: Convert to fraction form
    420,313.74/630,655.44 = 220,587.33/x
  3. Step 3: Cross multiply
    420,313.74x = 630,655.44 × 220,587.33
  4. Step 4: Simplify right side
    420,313.74x = 139,114,599,659.58
  5. Step 5: Solve for x
    x = 139,114,599,659.58/420,313.74
  6. Step 6: Final answer
    x = 330,978.00

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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.