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Finding the Fourth Proportional to 786,674.76, 1,085,608.74 and 447,208.36

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Solution

The fourth proportional to 786,674.76, 1,085,608.74 and 447,208.36 is: 617,146.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,674.76 : 1,085,608.74 = 447,208.36 : x
  2. Step 2: Convert to fraction form
    786,674.76/1,085,608.74 = 447,208.36/x
  3. Step 3: Cross multiply
    786,674.76x = 1,085,608.74 × 447,208.36
  4. Step 4: Simplify right side
    786,674.76x = 485,493,304,217.07
  5. Step 5: Solve for x
    x = 485,493,304,217.07/786,674.76
  6. Step 6: Final answer
    x = 617,146.16

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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.