Home / 645,110.51-890,282.88-358,635.38

Finding the Fourth Proportional to 645,110.51, 890,282.88 and 358,635.38

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Solution

The fourth proportional to 645,110.51, 890,282.88 and 358,635.38 is: 494,933.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,110.51 : 890,282.88 = 358,635.38 : x
  2. Step 2: Convert to fraction form
    645,110.51/890,282.88 = 358,635.38/x
  3. Step 3: Cross multiply
    645,110.51x = 890,282.88 × 358,635.38
  4. Step 4: Simplify right side
    645,110.51x = 319,286,934,524.88
  5. Step 5: Solve for x
    x = 319,286,934,524.88/645,110.51
  6. Step 6: Final answer
    x = 494,933.71

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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.