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Finding the Fourth Proportional to 57,438.40, 80,530.40 and 57,438.40

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Solution

The fourth proportional to 57,438.40, 80,530.40 and 57,438.40 is: 80,530.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,438.40 : 80,530.40 = 57,438.40 : x
  2. Step 2: Convert to fraction form
    57,438.40/80,530.40 = 57,438.40/x
  3. Step 3: Cross multiply
    57,438.40x = 80,530.40 × 57,438.40
  4. Step 4: Simplify right side
    57,438.40x = 4,625,537,327.36
  5. Step 5: Solve for x
    x = 4,625,537,327.36/57,438.40
  6. Step 6: Final answer
    x = 80,530.40

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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.