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Finding the Fourth Proportional to 720.04, 1,080.54 and 476.68

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Solution

The fourth proportional to 720.04, 1,080.54 and 476.68 is: 715.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.04 : 1,080.54 = 476.68 : x
  2. Step 2: Convert to fraction form
    720.04/1,080.54 = 476.68/x
  3. Step 3: Cross multiply
    720.04x = 1,080.54 × 476.68
  4. Step 4: Simplify right side
    720.04x = 515,071.81
  5. Step 5: Solve for x
    x = 515,071.81/720.04
  6. Step 6: Final answer
    x = 715.34

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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.