Home / 215,930.72-298,349.88-155,381.60

Finding the Fourth Proportional to 215,930.72, 298,349.88 and 155,381.60

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Solution

The fourth proportional to 215,930.72, 298,349.88 and 155,381.60 is: 214,689.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,930.72 : 298,349.88 = 155,381.60 : x
  2. Step 2: Convert to fraction form
    215,930.72/298,349.88 = 155,381.60/x
  3. Step 3: Cross multiply
    215,930.72x = 298,349.88 × 155,381.60
  4. Step 4: Simplify right side
    215,930.72x = 46,358,081,714.21
  5. Step 5: Solve for x
    x = 46,358,081,714.21/215,930.72
  6. Step 6: Final answer
    x = 214,689.61

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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.