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Finding the Fourth Proportional to 1,006.96, 1,389.63 and 564.87

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Solution

The fourth proportional to 1,006.96, 1,389.63 and 564.87 is: 779.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.96 : 1,389.63 = 564.87 : x
  2. Step 2: Convert to fraction form
    1,006.96/1,389.63 = 564.87/x
  3. Step 3: Cross multiply
    1,006.96x = 1,389.63 × 564.87
  4. Step 4: Simplify right side
    1,006.96x = 784,966.04
  5. Step 5: Solve for x
    x = 784,966.04/1,006.96
  6. Step 6: Final answer
    x = 779.54

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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.