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Finding the Fourth Proportional to 904.64, 1,356.48 and 288.09

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Solution

The fourth proportional to 904.64, 1,356.48 and 288.09 is: 431.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.64 : 1,356.48 = 288.09 : x
  2. Step 2: Convert to fraction form
    904.64/1,356.48 = 288.09/x
  3. Step 3: Cross multiply
    904.64x = 1,356.48 × 288.09
  4. Step 4: Simplify right side
    904.64x = 390,788.32
  5. Step 5: Solve for x
    x = 390,788.32/904.64
  6. Step 6: Final answer
    x = 431.98

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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.