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Finding the Fourth Proportional to 480, 661.76 and 433.60

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Solution

The fourth proportional to 480, 661.76 and 433.60 is: 597.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    480 : 661.76 = 433.60 : x
  2. Step 2: Convert to fraction form
    480/661.76 = 433.60/x
  3. Step 3: Cross multiply
    480x = 661.76 × 433.60
  4. Step 4: Simplify right side
    480x = 286,939.14
  5. Step 5: Solve for x
    x = 286,939.14/480
  6. Step 6: Final answer
    x = 597.79

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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.