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Finding the Fourth Proportional to 40,657.20, 60,985.80 and 40,268.40

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Solution

The fourth proportional to 40,657.20, 60,985.80 and 40,268.40 is: 60,402.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,657.20 : 60,985.80 = 40,268.40 : x
  2. Step 2: Convert to fraction form
    40,657.20/60,985.80 = 40,268.40/x
  3. Step 3: Cross multiply
    40,657.20x = 60,985.80 × 40,268.40
  4. Step 4: Simplify right side
    40,657.20x = 2,455,800,588.72
  5. Step 5: Solve for x
    x = 2,455,800,588.72/40,657.20
  6. Step 6: Final answer
    x = 60,402.60

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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.