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Finding the Fourth Proportional to 1,007, 1,389.52 and 564.92

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Solution

The fourth proportional to 1,007, 1,389.52 and 564.92 is: 779.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007 : 1,389.52 = 564.92 : x
  2. Step 2: Convert to fraction form
    1,007/1,389.52 = 564.92/x
  3. Step 3: Cross multiply
    1,007x = 1,389.52 × 564.92
  4. Step 4: Simplify right side
    1,007x = 784,967.64
  5. Step 5: Solve for x
    x = 784,967.64/1,007
  6. Step 6: Final answer
    x = 779.51

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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.