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Finding the Fourth Proportional to 904.18, 1,356.26 and 287.93

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Solution

The fourth proportional to 904.18, 1,356.26 and 287.93 is: 431.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.18 : 1,356.26 = 287.93 : x
  2. Step 2: Convert to fraction form
    904.18/1,356.26 = 287.93/x
  3. Step 3: Cross multiply
    904.18x = 1,356.26 × 287.93
  4. Step 4: Simplify right side
    904.18x = 390,507.94
  5. Step 5: Solve for x
    x = 390,507.94/904.18
  6. Step 6: Final answer
    x = 431.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.