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Finding the Fourth Proportional to 720,168.64, 1,080,239.04 and 215,071.84

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Solution

The fourth proportional to 720,168.64, 1,080,239.04 and 215,071.84 is: 322,603.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,168.64 : 1,080,239.04 = 215,071.84 : x
  2. Step 2: Convert to fraction form
    720,168.64/1,080,239.04 = 215,071.84/x
  3. Step 3: Cross multiply
    720,168.64x = 1,080,239.04 × 215,071.84
  4. Step 4: Simplify right side
    720,168.64x = 232,328,997,972.63
  5. Step 5: Solve for x
    x = 232,328,997,972.63/720,168.64
  6. Step 6: Final answer
    x = 322,603.60

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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.