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Finding the Fourth Proportional to 1,942,687.61, 2,913,400.81 and 645,491.62

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Solution

The fourth proportional to 1,942,687.61, 2,913,400.81 and 645,491.62 is: 968,027.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942,687.61 : 2,913,400.81 = 645,491.62 : x
  2. Step 2: Convert to fraction form
    1,942,687.61/2,913,400.81 = 645,491.62/x
  3. Step 3: Cross multiply
    1,942,687.61x = 2,913,400.81 × 645,491.62
  4. Step 4: Simplify right side
    1,942,687.61x = 1,880,575,808,556.21
  5. Step 5: Solve for x
    x = 1,880,575,808,556.21/1,942,687.61
  6. Step 6: Final answer
    x = 968,027.90

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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.