Home / 393,966,915.85-543,685,905.86-215,360,673.58

Finding the Fourth Proportional to 393,966,915.85, 543,685,905.86 and 215,360,673.58

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Solution

The fourth proportional to 393,966,915.85, 543,685,905.86 and 215,360,673.58 is: 297,204,049.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,966,915.85 : 543,685,905.86 = 215,360,673.58 : x
  2. Step 2: Convert to fraction form
    393,966,915.85/543,685,905.86 = 215,360,673.58/x
  3. Step 3: Cross multiply
    393,966,915.85x = 543,685,905.86 × 215,360,673.58
  4. Step 4: Simplify right side
    393,966,915.85x = 117,088,562,901,962,080
  5. Step 5: Solve for x
    x = 117,088,562,901,962,080/393,966,915.85
  6. Step 6: Final answer
    x = 297,204,049.86

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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.