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Finding the Fourth Proportional to 1,006.99, 1,389.81 and 608.98

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Solution

The fourth proportional to 1,006.99, 1,389.81 and 608.98 is: 840.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.99 : 1,389.81 = 608.98 : x
  2. Step 2: Convert to fraction form
    1,006.99/1,389.81 = 608.98/x
  3. Step 3: Cross multiply
    1,006.99x = 1,389.81 × 608.98
  4. Step 4: Simplify right side
    1,006.99x = 846,366.49
  5. Step 5: Solve for x
    x = 846,366.49/1,006.99
  6. Step 6: Final answer
    x = 840.49

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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.