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Finding the Fourth Proportional to 40,645.80, 60,968.70 and 40,386.60

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Solution

The fourth proportional to 40,645.80, 60,968.70 and 40,386.60 is: 60,579.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,645.80 : 60,968.70 = 40,386.60 : x
  2. Step 2: Convert to fraction form
    40,645.80/60,968.70 = 40,386.60/x
  3. Step 3: Cross multiply
    40,645.80x = 60,968.70 × 40,386.60
  4. Step 4: Simplify right side
    40,645.80x = 2,462,318,499.42
  5. Step 5: Solve for x
    x = 2,462,318,499.42/40,645.80
  6. Step 6: Final answer
    x = 60,579.90

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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.