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Finding the Fourth Proportional to 665,979,668.40, 998,969,502.60 and 655,776,001.20

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Solution

The fourth proportional to 665,979,668.40, 998,969,502.60 and 655,776,001.20 is: 983,664,001.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,979,668.40 : 998,969,502.60 = 655,776,001.20 : x
  2. Step 2: Convert to fraction form
    665,979,668.40/998,969,502.60 = 655,776,001.20/x
  3. Step 3: Cross multiply
    665,979,668.40x = 998,969,502.60 × 655,776,001.20
  4. Step 4: Simplify right side
    665,979,668.40x = 655,100,225,735,781,120
  5. Step 5: Solve for x
    x = 655,100,225,735,781,120/665,979,668.40
  6. Step 6: Final answer
    x = 983,664,001.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.