Home / 1,440,400,770.81-1,987,755,080.72-780,351,048.81

Finding the Fourth Proportional to 1,440,400,770.81, 1,987,755,080.72 and 780,351,048.81

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Solution

The fourth proportional to 1,440,400,770.81, 1,987,755,080.72 and 780,351,048.81 is: 1,076,885,540.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440,400,770.81 : 1,987,755,080.72 = 780,351,048.81 : x
  2. Step 2: Convert to fraction form
    1,440,400,770.81/1,987,755,080.72 = 780,351,048.81/x
  3. Step 3: Cross multiply
    1,440,400,770.81x = 1,987,755,080.72 × 780,351,048.81
  4. Step 4: Simplify right side
    1,440,400,770.81x = 1,551,146,762,013,356,288
  5. Step 5: Solve for x
    x = 1,551,146,762,013,356,288/1,440,400,770.81
  6. Step 6: Final answer
    x = 1,076,885,540.09

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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.