Home / 645,109.38-890,281.33-358,634.25

Finding the Fourth Proportional to 645,109.38, 890,281.33 and 358,634.25

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Solution

The fourth proportional to 645,109.38, 890,281.33 and 358,634.25 is: 494,932.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,109.38 : 890,281.33 = 358,634.25 : x
  2. Step 2: Convert to fraction form
    645,109.38/890,281.33 = 358,634.25/x
  3. Step 3: Cross multiply
    645,109.38x = 890,281.33 × 358,634.25
  4. Step 4: Simplify right side
    645,109.38x = 319,285,376,176.97
  5. Step 5: Solve for x
    x = 319,285,376,176.97/645,109.38
  6. Step 6: Final answer
    x = 494,932.16

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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.