Home / 420,447.43-630,296.18-154,145.89

Finding the Fourth Proportional to 420,447.43, 630,296.18 and 154,145.89

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Solution

The fourth proportional to 420,447.43, 630,296.18 and 154,145.89 is: 231,081.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,447.43 : 630,296.18 = 154,145.89 : x
  2. Step 2: Convert to fraction form
    420,447.43/630,296.18 = 154,145.89/x
  3. Step 3: Cross multiply
    420,447.43x = 630,296.18 × 154,145.89
  4. Step 4: Simplify right side
    420,447.43x = 97,157,561,707.49
  5. Step 5: Solve for x
    x = 97,157,561,707.49/420,447.43
  6. Step 6: Final answer
    x = 231,081.36

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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.