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Finding the Fourth Proportional to 306,615.05, 423,142.70 and 170,657.69

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Solution

The fourth proportional to 306,615.05, 423,142.70 and 170,657.69 is: 235,515.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,615.05 : 423,142.70 = 170,657.69 : x
  2. Step 2: Convert to fraction form
    306,615.05/423,142.70 = 170,657.69/x
  3. Step 3: Cross multiply
    306,615.05x = 423,142.70 × 170,657.69
  4. Step 4: Simplify right side
    306,615.05x = 72,212,552,993.35
  5. Step 5: Solve for x
    x = 72,212,552,993.35/306,615.05
  6. Step 6: Final answer
    x = 235,515.36

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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.