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Finding the Fourth Proportional to 1,784,835.78, 2,678,317.50 and 647,686.74

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Solution

The fourth proportional to 1,784,835.78, 2,678,317.50 and 647,686.74 is: 971,916.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,784,835.78 : 2,678,317.50 = 647,686.74 : x
  2. Step 2: Convert to fraction form
    1,784,835.78/2,678,317.50 = 647,686.74/x
  3. Step 3: Cross multiply
    1,784,835.78x = 2,678,317.50 × 647,686.74
  4. Step 4: Simplify right side
    1,784,835.78x = 1,734,710,730,259.95
  5. Step 5: Solve for x
    x = 1,734,710,730,259.95/1,784,835.78
  6. Step 6: Final answer
    x = 971,916.16

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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.