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Finding the Fourth Proportional to 279,657,886,515.78, 419,486,829,773.67 and 279,657,886,515.78

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Solution

The fourth proportional to 279,657,886,515.78, 419,486,829,773.67 and 279,657,886,515.78 is: 419,486,829,773.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,657,886,515.78 : 419,486,829,773.67 = 279,657,886,515.78 : x
  2. Step 2: Convert to fraction form
    279,657,886,515.78/419,486,829,773.67 = 279,657,886,515.78/x
  3. Step 3: Cross multiply
    279,657,886,515.78x = 419,486,829,773.67 × 279,657,886,515.78
  4. Step 4: Simplify right side
    279,657,886,515.78x = 117,312,800,235,709,343,465,472
  5. Step 5: Solve for x
    x = 117,312,800,235,709,343,465,472/279,657,886,515.78
  6. Step 6: Final answer
    x = 419,486,829,773.67

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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.