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Finding the Fourth Proportional to 1,006.98, 1,389.69 and 565.02

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Solution

The fourth proportional to 1,006.98, 1,389.69 and 565.02 is: 779.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.98 : 1,389.69 = 565.02 : x
  2. Step 2: Convert to fraction form
    1,006.98/1,389.69 = 565.02/x
  3. Step 3: Cross multiply
    1,006.98x = 1,389.69 × 565.02
  4. Step 4: Simplify right side
    1,006.98x = 785,192.87
  5. Step 5: Solve for x
    x = 785,192.87/1,006.98
  6. Step 6: Final answer
    x = 779.75

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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.