Home / 280,543,526.85-420,815,290.28-261,411,650.85

Finding the Fourth Proportional to 280,543,526.85, 420,815,290.28 and 261,411,650.85

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Solution

The fourth proportional to 280,543,526.85, 420,815,290.28 and 261,411,650.85 is: 392,117,476.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,543,526.85 : 420,815,290.28 = 261,411,650.85 : x
  2. Step 2: Convert to fraction form
    280,543,526.85/420,815,290.28 = 261,411,650.85/x
  3. Step 3: Cross multiply
    280,543,526.85x = 420,815,290.28 × 261,411,650.85
  4. Step 4: Simplify right side
    280,543,526.85x = 110,006,019,733,709,696
  5. Step 5: Solve for x
    x = 110,006,019,733,709,696/280,543,526.85
  6. Step 6: Final answer
    x = 392,117,476.28

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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.