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Finding the Fourth Proportional to 1,004.78, 1,386.48 and 584.99

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Solution

The fourth proportional to 1,004.78, 1,386.48 and 584.99 is: 807.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.78 : 1,386.48 = 584.99 : x
  2. Step 2: Convert to fraction form
    1,004.78/1,386.48 = 584.99/x
  3. Step 3: Cross multiply
    1,004.78x = 1,386.48 × 584.99
  4. Step 4: Simplify right side
    1,004.78x = 811,070.00
  5. Step 5: Solve for x
    x = 811,070.00/1,004.78
  6. Step 6: Final answer
    x = 807.22

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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.