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Finding the Fourth Proportional to 481,205.60, 721,808.40 and 256,479.20

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Solution

The fourth proportional to 481,205.60, 721,808.40 and 256,479.20 is: 384,718.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,205.60 : 721,808.40 = 256,479.20 : x
  2. Step 2: Convert to fraction form
    481,205.60/721,808.40 = 256,479.20/x
  3. Step 3: Cross multiply
    481,205.60x = 721,808.40 × 256,479.20
  4. Step 4: Simplify right side
    481,205.60x = 185,128,840,985.28
  5. Step 5: Solve for x
    x = 185,128,840,985.28/481,205.60
  6. Step 6: Final answer
    x = 384,718.80

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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.