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Finding the Fourth Proportional to 660,769,679.70, 991,154,519.55 and 553,274,255.70

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Solution

The fourth proportional to 660,769,679.70, 991,154,519.55 and 553,274,255.70 is: 829,911,383.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,769,679.70 : 991,154,519.55 = 553,274,255.70 : x
  2. Step 2: Convert to fraction form
    660,769,679.70/991,154,519.55 = 553,274,255.70/x
  3. Step 3: Cross multiply
    660,769,679.70x = 991,154,519.55 × 553,274,255.70
  4. Step 4: Simplify right side
    660,769,679.70x = 548,380,279,087,717,376
  5. Step 5: Solve for x
    x = 548,380,279,087,717,376/660,769,679.70
  6. Step 6: Final answer
    x = 829,911,383.55

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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.