Home / 645,067.72-890,154.42-358,577.80

Finding the Fourth Proportional to 645,067.72, 890,154.42 and 358,577.80

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Solution

The fourth proportional to 645,067.72, 890,154.42 and 358,577.80 is: 494,815.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,067.72 : 890,154.42 = 358,577.80 : x
  2. Step 2: Convert to fraction form
    645,067.72/890,154.42 = 358,577.80/x
  3. Step 3: Cross multiply
    645,067.72x = 890,154.42 × 358,577.80
  4. Step 4: Simplify right side
    645,067.72x = 319,189,613,583.88
  5. Step 5: Solve for x
    x = 319,189,613,583.88/645,067.72
  6. Step 6: Final answer
    x = 494,815.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.