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Finding the Fourth Proportional to 306,866.28, 423,475.60 and 170,926.32

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Solution

The fourth proportional to 306,866.28, 423,475.60 and 170,926.32 is: 235,878.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,866.28 : 423,475.60 = 170,926.32 : x
  2. Step 2: Convert to fraction form
    306,866.28/423,475.60 = 170,926.32/x
  3. Step 3: Cross multiply
    306,866.28x = 423,475.60 × 170,926.32
  4. Step 4: Simplify right side
    306,866.28x = 72,383,125,917.79
  5. Step 5: Solve for x
    x = 72,383,125,917.79/306,866.28
  6. Step 6: Final answer
    x = 235,878.40

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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.