Home / 1,217,711,871.44-1,680,442,382.74-660,794,918.50

Finding the Fourth Proportional to 1,217,711,871.44, 1,680,442,382.74 and 660,794,918.50

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Solution

The fourth proportional to 1,217,711,871.44, 1,680,442,382.74 and 660,794,918.50 is: 911,896,987.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,711,871.44 : 1,680,442,382.74 = 660,794,918.50 : x
  2. Step 2: Convert to fraction form
    1,217,711,871.44/1,680,442,382.74 = 660,794,918.50/x
  3. Step 3: Cross multiply
    1,217,711,871.44x = 1,680,442,382.74 × 660,794,918.50
  4. Step 4: Simplify right side
    1,217,711,871.44x = 1,110,427,787,346,624,128
  5. Step 5: Solve for x
    x = 1,110,427,787,346,624,128/1,217,711,871.44
  6. Step 6: Final answer
    x = 911,896,987.61

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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.