Home / 420,259.38-630,393.36-120,739.20

Finding the Fourth Proportional to 420,259.38, 630,393.36 and 120,739.20

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Solution

The fourth proportional to 420,259.38, 630,393.36 and 120,739.20 is: 181,110.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,259.38 : 630,393.36 = 120,739.20 : x
  2. Step 2: Convert to fraction form
    420,259.38/630,393.36 = 120,739.20/x
  3. Step 3: Cross multiply
    420,259.38x = 630,393.36 × 120,739.20
  4. Step 4: Simplify right side
    420,259.38x = 76,113,189,971.71
  5. Step 5: Solve for x
    x = 76,113,189,971.71/420,259.38
  6. Step 6: Final answer
    x = 181,110.03

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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.