Home / 457,440.10-686,193.78-120,478.28

Finding the Fourth Proportional to 457,440.10, 686,193.78 and 120,478.28

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Solution

The fourth proportional to 457,440.10, 686,193.78 and 120,478.28 is: 180,726.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,440.10 : 686,193.78 = 120,478.28 : x
  2. Step 2: Convert to fraction form
    457,440.10/686,193.78 = 120,478.28/x
  3. Step 3: Cross multiply
    457,440.10x = 686,193.78 × 120,478.28
  4. Step 4: Simplify right side
    457,440.10x = 82,671,449,814.84
  5. Step 5: Solve for x
    x = 82,671,449,814.84/457,440.10
  6. Step 6: Final answer
    x = 180,726.29

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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.