Home / 809,511,985.20-1,117,126,913.29-438,234,016.56

Finding the Fourth Proportional to 809,511,985.20, 1,117,126,913.29 and 438,234,016.56

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Solution

The fourth proportional to 809,511,985.20, 1,117,126,913.29 and 438,234,016.56 is: 604,763,145.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,511,985.20 : 1,117,126,913.29 = 438,234,016.56 : x
  2. Step 2: Convert to fraction form
    809,511,985.20/1,117,126,913.29 = 438,234,016.56/x
  3. Step 3: Cross multiply
    809,511,985.20x = 1,117,126,913.29 × 438,234,016.56
  4. Step 4: Simplify right side
    809,511,985.20x = 489,563,014,218,351,552
  5. Step 5: Solve for x
    x = 489,563,014,218,351,552/809,511,985.20
  6. Step 6: Final answer
    x = 604,763,145.17

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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.