Home / 1,217,711,870.94-1,680,442,382.05-660,794,918.00

Finding the Fourth Proportional to 1,217,711,870.94, 1,680,442,382.05 and 660,794,918.00

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Solution

The fourth proportional to 1,217,711,870.94, 1,680,442,382.05 and 660,794,918.00 is: 911,896,986.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,711,870.94 : 1,680,442,382.05 = 660,794,918.00 : x
  2. Step 2: Convert to fraction form
    1,217,711,870.94/1,680,442,382.05 = 660,794,918.00/x
  3. Step 3: Cross multiply
    1,217,711,870.94x = 1,680,442,382.05 × 660,794,918.00
  4. Step 4: Simplify right side
    1,217,711,870.94x = 1,110,427,786,049,894,784
  5. Step 5: Solve for x
    x = 1,110,427,786,049,894,784/1,217,711,870.94
  6. Step 6: Final answer
    x = 911,896,986.92

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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.