Home / 285,103.91-393,455.75-157,779.55

Finding the Fourth Proportional to 285,103.91, 393,455.75 and 157,779.55

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Solution

The fourth proportional to 285,103.91, 393,455.75 and 157,779.55 is: 217,742.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,103.91 : 393,455.75 = 157,779.55 : x
  2. Step 2: Convert to fraction form
    285,103.91/393,455.75 = 157,779.55/x
  3. Step 3: Cross multiply
    285,103.91x = 393,455.75 × 157,779.55
  4. Step 4: Simplify right side
    285,103.91x = 62,079,268,423.74
  5. Step 5: Solve for x
    x = 62,079,268,423.74/285,103.91
  6. Step 6: Final answer
    x = 217,742.61

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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.