Home / 457,828.12-686,727.60-120,858.40

Finding the Fourth Proportional to 457,828.12, 686,727.60 and 120,858.40

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Solution

The fourth proportional to 457,828.12, 686,727.60 and 120,858.40 is: 181,283.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,828.12 : 686,727.60 = 120,858.40 : x
  2. Step 2: Convert to fraction form
    457,828.12/686,727.60 = 120,858.40/x
  3. Step 3: Cross multiply
    457,828.12x = 686,727.60 × 120,858.40
  4. Step 4: Simplify right side
    457,828.12x = 82,996,798,971.84
  5. Step 5: Solve for x
    x = 82,996,798,971.84/457,828.12
  6. Step 6: Final answer
    x = 181,283.75

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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.