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Finding the Fourth Proportional to 457,790.40, 639,662.40 and 457,790.40

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Solution

The fourth proportional to 457,790.40, 639,662.40 and 457,790.40 is: 639,662.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,790.40 : 639,662.40 = 457,790.40 : x
  2. Step 2: Convert to fraction form
    457,790.40/639,662.40 = 457,790.40/x
  3. Step 3: Cross multiply
    457,790.40x = 639,662.40 × 457,790.40
  4. Step 4: Simplify right side
    457,790.40x = 292,831,305,960.96
  5. Step 5: Solve for x
    x = 292,831,305,960.96/457,790.40
  6. Step 6: Final answer
    x = 639,662.40

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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.