Home / 809,511,974.40-1,117,126,898.45-438,234,005.78

Finding the Fourth Proportional to 809,511,974.40, 1,117,126,898.45 and 438,234,005.78

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Solution

The fourth proportional to 809,511,974.40, 1,117,126,898.45 and 438,234,005.78 is: 604,763,130.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,511,974.40 : 1,117,126,898.45 = 438,234,005.78 : x
  2. Step 2: Convert to fraction form
    809,511,974.40/1,117,126,898.45 = 438,234,005.78/x
  3. Step 3: Cross multiply
    809,511,974.40x = 1,117,126,898.45 × 438,234,005.78
  4. Step 4: Simplify right side
    809,511,974.40x = 489,562,995,672,330,752
  5. Step 5: Solve for x
    x = 489,562,995,672,330,752/809,511,974.40
  6. Step 6: Final answer
    x = 604,763,130.32

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Double scale
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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.