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Finding the Fourth Proportional to 618,607,803.88, 853,709,414.80 and 383,734,140.63

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Solution

The fourth proportional to 618,607,803.88, 853,709,414.80 and 383,734,140.63 is: 529,572,124.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,607,803.88 : 853,709,414.80 = 383,734,140.63 : x
  2. Step 2: Convert to fraction form
    618,607,803.88/853,709,414.80 = 383,734,140.63/x
  3. Step 3: Cross multiply
    618,607,803.88x = 853,709,414.80 × 383,734,140.63
  4. Step 4: Simplify right side
    618,607,803.88x = 327,597,448,636,018,176
  5. Step 5: Solve for x
    x = 327,597,448,636,018,176/618,607,803.88
  6. Step 6: Final answer
    x = 529,572,124.02

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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.