Home / 1,189,185,215.12-1,640,705,360.63-687,211,124.12

Finding the Fourth Proportional to 1,189,185,215.12, 1,640,705,360.63 and 687,211,124.12

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Solution

The fourth proportional to 1,189,185,215.12, 1,640,705,360.63 and 687,211,124.12 is: 948,137,397.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,185,215.12 : 1,640,705,360.63 = 687,211,124.12 : x
  2. Step 2: Convert to fraction form
    1,189,185,215.12/1,640,705,360.63 = 687,211,124.12/x
  3. Step 3: Cross multiply
    1,189,185,215.12x = 1,640,705,360.63 × 687,211,124.12
  4. Step 4: Simplify right side
    1,189,185,215.12x = 1,127,510,975,216,612,736
  5. Step 5: Solve for x
    x = 1,127,510,975,216,612,736/1,189,185,215.12
  6. Step 6: Final answer
    x = 948,137,397.68

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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.