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Finding the Fourth Proportional to 548,745.40, 823,118.10 and 312,549.40

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Solution

The fourth proportional to 548,745.40, 823,118.10 and 312,549.40 is: 468,824.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,745.40 : 823,118.10 = 312,549.40 : x
  2. Step 2: Convert to fraction form
    548,745.40/823,118.10 = 312,549.40/x
  3. Step 3: Cross multiply
    548,745.40x = 823,118.10 × 312,549.40
  4. Step 4: Simplify right side
    548,745.40x = 257,265,068,284.14
  5. Step 5: Solve for x
    x = 257,265,068,284.14/548,745.40
  6. Step 6: Final answer
    x = 468,824.10

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Similar ratio
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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.