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Finding the Fourth Proportional to 1,398,392,330.40, 1,954,121,292 and 1,398,392,330.40

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Solution

The fourth proportional to 1,398,392,330.40, 1,954,121,292 and 1,398,392,330.40 is: 1,954,121,292

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,392,330.40 : 1,954,121,292 = 1,398,392,330.40 : x
  2. Step 2: Convert to fraction form
    1,398,392,330.40/1,954,121,292 = 1,398,392,330.40/x
  3. Step 3: Cross multiply
    1,398,392,330.40x = 1,954,121,292 × 1,398,392,330.40
  4. Step 4: Simplify right side
    1,398,392,330.40x = 2,732,628,227,404,139,008
  5. Step 5: Solve for x
    x = 2,732,628,227,404,139,008/1,398,392,330.40
  6. Step 6: Final answer
    x = 1,954,121,292

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.