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Finding the Fourth Proportional to 306,377.55, 422,790.87 and 170,407.65

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Solution

The fourth proportional to 306,377.55, 422,790.87 and 170,407.65 is: 235,156.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,377.55 : 422,790.87 = 170,407.65 : x
  2. Step 2: Convert to fraction form
    306,377.55/422,790.87 = 170,407.65/x
  3. Step 3: Cross multiply
    306,377.55x = 422,790.87 × 170,407.65
  4. Step 4: Simplify right side
    306,377.55x = 72,046,798,598.16
  5. Step 5: Solve for x
    x = 72,046,798,598.16/306,377.55
  6. Step 6: Final answer
    x = 235,156.91

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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.