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Finding the Fourth Proportional to 643,825.12, 966,685.69 and 360,071.60

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Solution

The fourth proportional to 643,825.12, 966,685.69 and 360,071.60 is: 540,637.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,825.12 : 966,685.69 = 360,071.60 : x
  2. Step 2: Convert to fraction form
    643,825.12/966,685.69 = 360,071.60/x
  3. Step 3: Cross multiply
    643,825.12x = 966,685.69 × 360,071.60
  4. Step 4: Simplify right side
    643,825.12x = 348,076,064,611.94
  5. Step 5: Solve for x
    x = 348,076,064,611.94/643,825.12
  6. Step 6: Final answer
    x = 540,637.60

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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.