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Finding the Fourth Proportional to 287.04, 432.07 and 219.40

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Solution

The fourth proportional to 287.04, 432.07 and 219.40 is: 330.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.04 : 432.07 = 219.40 : x
  2. Step 2: Convert to fraction form
    287.04/432.07 = 219.40/x
  3. Step 3: Cross multiply
    287.04x = 432.07 × 219.40
  4. Step 4: Simplify right side
    287.04x = 94,796.16
  5. Step 5: Solve for x
    x = 94,796.16/287.04
  6. Step 6: Final answer
    x = 330.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.