Home / 1,490,310,909.84-2,056,642,656.69-821,279,959.50

Finding the Fourth Proportional to 1,490,310,909.84, 2,056,642,656.69 and 821,279,959.50

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Solution

The fourth proportional to 1,490,310,909.84, 2,056,642,656.69 and 821,279,959.50 is: 1,133,373,839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490,310,909.84 : 2,056,642,656.69 = 821,279,959.50 : x
  2. Step 2: Convert to fraction form
    1,490,310,909.84/2,056,642,656.69 = 821,279,959.50/x
  3. Step 3: Cross multiply
    1,490,310,909.84x = 2,056,642,656.69 × 821,279,959.50
  4. Step 4: Simplify right side
    1,490,310,909.84x = 1,689,079,397,792,335,616
  5. Step 5: Solve for x
    x = 1,689,079,397,792,335,616/1,490,310,909.84
  6. Step 6: Final answer
    x = 1,133,373,839.40

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Double scale
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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.