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Finding the Fourth Proportional to 685,794.84, 946,386.88 and 379,870.20

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Solution

The fourth proportional to 685,794.84, 946,386.88 and 379,870.20 is: 524,215.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,794.84 : 946,386.88 = 379,870.20 : x
  2. Step 2: Convert to fraction form
    685,794.84/946,386.88 = 379,870.20/x
  3. Step 3: Cross multiply
    685,794.84x = 946,386.88 × 379,870.20
  4. Step 4: Simplify right side
    685,794.84x = 359,504,173,382.98
  5. Step 5: Solve for x
    x = 359,504,173,382.98/685,794.84
  6. Step 6: Final answer
    x = 524,215.34

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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.