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Finding the Fourth Proportional to 1,004.79, 1,386.54 and 562.63

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Solution

The fourth proportional to 1,004.79, 1,386.54 and 562.63 is: 776.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.79 : 1,386.54 = 562.63 : x
  2. Step 2: Convert to fraction form
    1,004.79/1,386.54 = 562.63/x
  3. Step 3: Cross multiply
    1,004.79x = 1,386.54 × 562.63
  4. Step 4: Simplify right side
    1,004.79x = 780,112.01
  5. Step 5: Solve for x
    x = 780,112.01/1,004.79
  6. Step 6: Final answer
    x = 776.39

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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.