Home / 420,445.80-630,293.74-154,144.26

Finding the Fourth Proportional to 420,445.80, 630,293.74 and 154,144.26

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Solution

The fourth proportional to 420,445.80, 630,293.74 and 154,144.26 is: 231,078.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,445.80 : 630,293.74 = 154,144.26 : x
  2. Step 2: Convert to fraction form
    420,445.80/630,293.74 = 154,144.26/x
  3. Step 3: Cross multiply
    420,445.80x = 630,293.74 × 154,144.26
  4. Step 4: Simplify right side
    420,445.80x = 97,156,161,749.57
  5. Step 5: Solve for x
    x = 97,156,161,749.57/420,445.80
  6. Step 6: Final answer
    x = 231,078.92

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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.