Home / 645,491,838.44-890,656,908.90-384,755,715.56

Finding the Fourth Proportional to 645,491,838.44, 890,656,908.90 and 384,755,715.56

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Solution

The fourth proportional to 645,491,838.44, 890,656,908.90 and 384,755,715.56 is: 530,890,269.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,491,838.44 : 890,656,908.90 = 384,755,715.56 : x
  2. Step 2: Convert to fraction form
    645,491,838.44/890,656,908.90 = 384,755,715.56/x
  3. Step 3: Cross multiply
    645,491,838.44x = 890,656,908.90 × 384,755,715.56
  4. Step 4: Simplify right side
    645,491,838.44x = 342,685,336,302,277,248
  5. Step 5: Solve for x
    x = 342,685,336,302,277,248/645,491,838.44
  6. Step 6: Final answer
    x = 530,890,269.86

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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.