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Finding the Fourth Proportional to 1,004.74, 1,386.42 and 562.57

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Solution

The fourth proportional to 1,004.74, 1,386.42 and 562.57 is: 776.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.74 : 1,386.42 = 562.57 : x
  2. Step 2: Convert to fraction form
    1,004.74/1,386.42 = 562.57/x
  3. Step 3: Cross multiply
    1,004.74x = 1,386.42 × 562.57
  4. Step 4: Simplify right side
    1,004.74x = 779,958.98
  5. Step 5: Solve for x
    x = 779,958.98/1,004.74
  6. Step 6: Final answer
    x = 776.28

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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.