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Finding the Fourth Proportional to 1,205,863,981.88, 1,808,367,916.94 and 353,803,685.88

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Solution

The fourth proportional to 1,205,863,981.88, 1,808,367,916.94 and 353,803,685.88 is: 530,579,936.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205,863,981.88 : 1,808,367,916.94 = 353,803,685.88 : x
  2. Step 2: Convert to fraction form
    1,205,863,981.88/1,808,367,916.94 = 353,803,685.88/x
  3. Step 3: Cross multiply
    1,205,863,981.88x = 1,808,367,916.94 × 353,803,685.88
  4. Step 4: Simplify right side
    1,205,863,981.88x = 639,807,234,440,509,696
  5. Step 5: Solve for x
    x = 639,807,234,440,509,696/1,205,863,981.88
  6. Step 6: Final answer
    x = 530,579,936.09

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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.