Home / 278,558.31-384,434.27-157,720.89

Finding the Fourth Proportional to 278,558.31, 384,434.27 and 157,720.89

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Solution

The fourth proportional to 278,558.31, 384,434.27 and 157,720.89 is: 217,668.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,558.31 : 384,434.27 = 157,720.89 : x
  2. Step 2: Convert to fraction form
    278,558.31/384,434.27 = 157,720.89/x
  3. Step 3: Cross multiply
    278,558.31x = 384,434.27 × 157,720.89
  4. Step 4: Simplify right side
    278,558.31x = 60,633,314,422.30
  5. Step 5: Solve for x
    x = 60,633,314,422.30/278,558.31
  6. Step 6: Final answer
    x = 217,668.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.