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Finding the Fourth Proportional to 263,478.64, 395,280.84 and 85,985.98

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Solution

The fourth proportional to 263,478.64, 395,280.84 and 85,985.98 is: 128,999.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,478.64 : 395,280.84 = 85,985.98 : x
  2. Step 2: Convert to fraction form
    263,478.64/395,280.84 = 85,985.98/x
  3. Step 3: Cross multiply
    263,478.64x = 395,280.84 × 85,985.98
  4. Step 4: Simplify right side
    263,478.64x = 33,988,610,402.62
  5. Step 5: Solve for x
    x = 33,988,610,402.62/263,478.64
  6. Step 6: Final answer
    x = 128,999.49

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1.5x scale

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.