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Finding the Fourth Proportional to 40,920.40, 57,405.20 and 40,920.40

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Solution

The fourth proportional to 40,920.40, 57,405.20 and 40,920.40 is: 57,405.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,920.40 : 57,405.20 = 40,920.40 : x
  2. Step 2: Convert to fraction form
    40,920.40/57,405.20 = 40,920.40/x
  3. Step 3: Cross multiply
    40,920.40x = 57,405.20 × 40,920.40
  4. Step 4: Simplify right side
    40,920.40x = 2,349,043,746.08
  5. Step 5: Solve for x
    x = 2,349,043,746.08/40,920.40
  6. Step 6: Final answer
    x = 57,405.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.