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Finding the Fourth Proportional to 891,098,443.80, 1,336,647,665.70 and 814,507,954.20

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Solution

The fourth proportional to 891,098,443.80, 1,336,647,665.70 and 814,507,954.20 is: 1,221,761,931.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,098,443.80 : 1,336,647,665.70 = 814,507,954.20 : x
  2. Step 2: Convert to fraction form
    891,098,443.80/1,336,647,665.70 = 814,507,954.20/x
  3. Step 3: Cross multiply
    891,098,443.80x = 1,336,647,665.70 × 814,507,954.20
  4. Step 4: Simplify right side
    891,098,443.80x = 1,088,710,155,675,512,576
  5. Step 5: Solve for x
    x = 1,088,710,155,675,512,576/891,098,443.80
  6. Step 6: Final answer
    x = 1,221,761,931.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.