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Finding the Fourth Proportional to 904.52, 1,356.92 and 288.12

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Solution

The fourth proportional to 904.52, 1,356.92 and 288.12 is: 432.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.52 : 1,356.92 = 288.12 : x
  2. Step 2: Convert to fraction form
    904.52/1,356.92 = 288.12/x
  3. Step 3: Cross multiply
    904.52x = 1,356.92 × 288.12
  4. Step 4: Simplify right side
    904.52x = 390,955.79
  5. Step 5: Solve for x
    x = 390,955.79/904.52
  6. Step 6: Final answer
    x = 432.22

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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.