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Finding the Fourth Proportional to 254,543.60, 381,815.40 and 213,071.60

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Solution

The fourth proportional to 254,543.60, 381,815.40 and 213,071.60 is: 319,607.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,543.60 : 381,815.40 = 213,071.60 : x
  2. Step 2: Convert to fraction form
    254,543.60/381,815.40 = 213,071.60/x
  3. Step 3: Cross multiply
    254,543.60x = 381,815.40 × 213,071.60
  4. Step 4: Simplify right side
    254,543.60x = 81,354,018,182.64
  5. Step 5: Solve for x
    x = 81,354,018,182.64/254,543.60
  6. Step 6: Final answer
    x = 319,607.40

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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.