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Finding the Fourth Proportional to 904.72, 1,248.24 and 555.16

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Solution

The fourth proportional to 904.72, 1,248.24 and 555.16 is: 765.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.72 : 1,248.24 = 555.16 : x
  2. Step 2: Convert to fraction form
    904.72/1,248.24 = 555.16/x
  3. Step 3: Cross multiply
    904.72x = 1,248.24 × 555.16
  4. Step 4: Simplify right side
    904.72x = 692,972.92
  5. Step 5: Solve for x
    x = 692,972.92/904.72
  6. Step 6: Final answer
    x = 765.95

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Double scale
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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.