Home / 685,445,913.92-945,905,676.32-388,080,482.88

Finding the Fourth Proportional to 685,445,913.92, 945,905,676.32 and 388,080,482.88

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Solution

The fourth proportional to 685,445,913.92, 945,905,676.32 and 388,080,482.88 is: 535,545,583.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,445,913.92 : 945,905,676.32 = 388,080,482.88 : x
  2. Step 2: Convert to fraction form
    685,445,913.92/945,905,676.32 = 388,080,482.88/x
  3. Step 3: Cross multiply
    685,445,913.92x = 945,905,676.32 × 388,080,482.88
  4. Step 4: Simplify right side
    685,445,913.92x = 367,087,531,625,198,592
  5. Step 5: Solve for x
    x = 367,087,531,625,198,592/685,445,913.92
  6. Step 6: Final answer
    x = 535,545,583.06

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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.