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Finding the Fourth Proportional to 1,984,913.78, 2,977,758.36 and 636,972.75

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Solution

The fourth proportional to 1,984,913.78, 2,977,758.36 and 636,972.75 is: 955,583.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984,913.78 : 2,977,758.36 = 636,972.75 : x
  2. Step 2: Convert to fraction form
    1,984,913.78/2,977,758.36 = 636,972.75/x
  3. Step 3: Cross multiply
    1,984,913.78x = 2,977,758.36 × 636,972.75
  4. Step 4: Simplify right side
    1,984,913.78x = 1,896,750,931,404.69
  5. Step 5: Solve for x
    x = 1,896,750,931,404.69/1,984,913.78
  6. Step 6: Final answer
    x = 955,583.54

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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.