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Finding the Fourth Proportional to 1,349,706,894.32, 1,861,781,073.92 and 891,419,246.40

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Solution

The fourth proportional to 1,349,706,894.32, 1,861,781,073.92 and 891,419,246.40 is: 1,229,620,659.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349,706,894.32 : 1,861,781,073.92 = 891,419,246.40 : x
  2. Step 2: Convert to fraction form
    1,349,706,894.32/1,861,781,073.92 = 891,419,246.40/x
  3. Step 3: Cross multiply
    1,349,706,894.32x = 1,861,781,073.92 × 891,419,246.40
  4. Step 4: Simplify right side
    1,349,706,894.32x = 1,659,627,481,875,549,184
  5. Step 5: Solve for x
    x = 1,659,627,481,875,549,184/1,349,706,894.32
  6. Step 6: Final answer
    x = 1,229,620,659.76

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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.