Home / 438,985.72-658,478.80-123,442.60

Finding the Fourth Proportional to 438,985.72, 658,478.80 and 123,442.60

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Solution

The fourth proportional to 438,985.72, 658,478.80 and 123,442.60 is: 185,163.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,985.72 : 658,478.80 = 123,442.60 : x
  2. Step 2: Convert to fraction form
    438,985.72/658,478.80 = 123,442.60/x
  3. Step 3: Cross multiply
    438,985.72x = 658,478.80 × 123,442.60
  4. Step 4: Simplify right side
    438,985.72x = 81,284,335,116.88
  5. Step 5: Solve for x
    x = 81,284,335,116.88/438,985.72
  6. Step 6: Final answer
    x = 185,163.96

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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.