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Finding the Fourth Proportional to 1,007.03, 1,389.73 and 564.95

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Solution

The fourth proportional to 1,007.03, 1,389.73 and 564.95 is: 779.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.03 : 1,389.73 = 564.95 : x
  2. Step 2: Convert to fraction form
    1,007.03/1,389.73 = 564.95/x
  3. Step 3: Cross multiply
    1,007.03x = 1,389.73 × 564.95
  4. Step 4: Simplify right side
    1,007.03x = 785,127.96
  5. Step 5: Solve for x
    x = 785,127.96/1,007.03
  6. Step 6: Final answer
    x = 779.65

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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.