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Finding the Fourth Proportional to 40,940.40, 61,264.80 and 28,401.60

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Solution

The fourth proportional to 40,940.40, 61,264.80 and 28,401.60 is: 42,501.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,940.40 : 61,264.80 = 28,401.60 : x
  2. Step 2: Convert to fraction form
    40,940.40/61,264.80 = 28,401.60/x
  3. Step 3: Cross multiply
    40,940.40x = 61,264.80 × 28,401.60
  4. Step 4: Simplify right side
    40,940.40x = 1,740,018,343.68
  5. Step 5: Solve for x
    x = 1,740,018,343.68/40,940.40
  6. Step 6: Final answer
    x = 42,501.25

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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.