Home / 420,575.14-630,489.55-154,274.40

Finding the Fourth Proportional to 420,575.14, 630,489.55 and 154,274.40

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Solution

The fourth proportional to 420,575.14, 630,489.55 and 154,274.40 is: 231,274.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,575.14 : 630,489.55 = 154,274.40 : x
  2. Step 2: Convert to fraction form
    420,575.14/630,489.55 = 154,274.40/x
  3. Step 3: Cross multiply
    420,575.14x = 630,489.55 × 154,274.40
  4. Step 4: Simplify right side
    420,575.14x = 97,268,394,728.95
  5. Step 5: Solve for x
    x = 97,268,394,728.95/420,575.14
  6. Step 6: Final answer
    x = 231,274.72

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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.