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Finding the Fourth Proportional to 904.22, 1,247 and 572.06

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Solution

The fourth proportional to 904.22, 1,247 and 572.06 is: 788.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.22 : 1,247 = 572.06 : x
  2. Step 2: Convert to fraction form
    904.22/1,247 = 572.06/x
  3. Step 3: Cross multiply
    904.22x = 1,247 × 572.06
  4. Step 4: Simplify right side
    904.22x = 713,358.82
  5. Step 5: Solve for x
    x = 713,358.82/904.22
  6. Step 6: Final answer
    x = 788.92

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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.