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Finding the Fourth Proportional to 670,641.12, 925,407.12 and 384,144.12

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Solution

The fourth proportional to 670,641.12, 925,407.12 and 384,144.12 is: 530,074.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,641.12 : 925,407.12 = 384,144.12 : x
  2. Step 2: Convert to fraction form
    670,641.12/925,407.12 = 384,144.12/x
  3. Step 3: Cross multiply
    670,641.12x = 925,407.12 × 384,144.12
  4. Step 4: Simplify right side
    670,641.12x = 355,489,703,754.13
  5. Step 5: Solve for x
    x = 355,489,703,754.13/670,641.12
  6. Step 6: Final answer
    x = 530,074.42

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Double scale
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Similar ratio
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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.