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Finding the Fourth Proportional to 904.93, 1,248.71 and 511.88

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Solution

The fourth proportional to 904.93, 1,248.71 and 511.88 is: 706.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.93 : 1,248.71 = 511.88 : x
  2. Step 2: Convert to fraction form
    904.93/1,248.71 = 511.88/x
  3. Step 3: Cross multiply
    904.93x = 1,248.71 × 511.88
  4. Step 4: Simplify right side
    904.93x = 639,180.87
  5. Step 5: Solve for x
    x = 639,180.87/904.93
  6. Step 6: Final answer
    x = 706.33

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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.