Home / 393,367,018.45-542,848,219.30-217,156,461.78

Finding the Fourth Proportional to 393,367,018.45, 542,848,219.30 and 217,156,461.78

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Solution

The fourth proportional to 393,367,018.45, 542,848,219.30 and 217,156,461.78 is: 299,676,874.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,367,018.45 : 542,848,219.30 = 217,156,461.78 : x
  2. Step 2: Convert to fraction form
    393,367,018.45/542,848,219.30 = 217,156,461.78/x
  3. Step 3: Cross multiply
    393,367,018.45x = 542,848,219.30 × 217,156,461.78
  4. Step 4: Simplify right side
    393,367,018.45x = 117,882,998,584,047,264
  5. Step 5: Solve for x
    x = 117,882,998,584,047,264/393,367,018.45
  6. Step 6: Final answer
    x = 299,676,874.41

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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.