Home / 718,697,783.20-991,805,930.04-388,672,922.20

Finding the Fourth Proportional to 718,697,783.20, 991,805,930.04 and 388,672,922.20

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Solution

The fourth proportional to 718,697,783.20, 991,805,930.04 and 388,672,922.20 is: 536,370,249.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,697,783.20 : 991,805,930.04 = 388,672,922.20 : x
  2. Step 2: Convert to fraction form
    718,697,783.20/991,805,930.04 = 388,672,922.20/x
  3. Step 3: Cross multiply
    718,697,783.20x = 991,805,930.04 × 388,672,922.20
  4. Step 4: Simplify right side
    718,697,783.20x = 385,488,109,083,935,552
  5. Step 5: Solve for x
    x = 385,488,109,083,935,552/718,697,783.20
  6. Step 6: Final answer
    x = 536,370,249.21

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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.