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Finding the Fourth Proportional to 1,791,531, 2,472,312.78 and 986,715

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Solution

The fourth proportional to 1,791,531, 2,472,312.78 and 986,715 is: 1,361,666.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791,531 : 2,472,312.78 = 986,715 : x
  2. Step 2: Convert to fraction form
    1,791,531/2,472,312.78 = 986,715/x
  3. Step 3: Cross multiply
    1,791,531x = 2,472,312.78 × 986,715
  4. Step 4: Simplify right side
    1,791,531x = 2,439,468,104,717.70
  5. Step 5: Solve for x
    x = 2,439,468,104,717.70/1,791,531
  6. Step 6: Final answer
    x = 1,361,666.70

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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.