Home / 645,111.51-890,284.26-358,636.38

Finding the Fourth Proportional to 645,111.51, 890,284.26 and 358,636.38

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Solution

The fourth proportional to 645,111.51, 890,284.26 and 358,636.38 is: 494,935.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,111.51 : 890,284.26 = 358,636.38 : x
  2. Step 2: Convert to fraction form
    645,111.51/890,284.26 = 358,636.38/x
  3. Step 3: Cross multiply
    645,111.51x = 890,284.26 × 358,636.38
  4. Step 4: Simplify right side
    645,111.51x = 319,288,324,177.38
  5. Step 5: Solve for x
    x = 319,288,324,177.38/645,111.51
  6. Step 6: Final answer
    x = 494,935.09

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Double scale
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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.