Home / 939,351,202.91-1,296,269,146.40-521,690,392.41

Finding the Fourth Proportional to 939,351,202.91, 1,296,269,146.40 and 521,690,392.41

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Solution

The fourth proportional to 939,351,202.91, 1,296,269,146.40 and 521,690,392.41 is: 719,913,018.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,351,202.91 : 1,296,269,146.40 = 521,690,392.41 : x
  2. Step 2: Convert to fraction form
    939,351,202.91/1,296,269,146.40 = 521,690,392.41/x
  3. Step 3: Cross multiply
    939,351,202.91x = 1,296,269,146.40 × 521,690,392.41
  4. Step 4: Simplify right side
    939,351,202.91x = 676,251,159,654,391,808
  5. Step 5: Solve for x
    x = 676,251,159,654,391,808/939,351,202.91
  6. Step 6: Final answer
    x = 719,913,018.22

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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.