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Finding the Fourth Proportional to 457,000.40, 685,500.60 and 120,018.80

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Solution

The fourth proportional to 457,000.40, 685,500.60 and 120,018.80 is: 180,028.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,000.40 : 685,500.60 = 120,018.80 : x
  2. Step 2: Convert to fraction form
    457,000.40/685,500.60 = 120,018.80/x
  3. Step 3: Cross multiply
    457,000.40x = 685,500.60 × 120,018.80
  4. Step 4: Simplify right side
    457,000.40x = 82,272,959,411.28
  5. Step 5: Solve for x
    x = 82,272,959,411.28/457,000.40
  6. Step 6: Final answer
    x = 180,028.20

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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.