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Finding the Fourth Proportional to 306,856.43, 423,431.54 and 170,903.03

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Solution

The fourth proportional to 306,856.43, 423,431.54 and 170,903.03 is: 235,829.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,856.43 : 423,431.54 = 170,903.03 : x
  2. Step 2: Convert to fraction form
    306,856.43/423,431.54 = 170,903.03/x
  3. Step 3: Cross multiply
    306,856.43x = 423,431.54 × 170,903.03
  4. Step 4: Simplify right side
    306,856.43x = 72,365,730,211.89
  5. Step 5: Solve for x
    x = 72,365,730,211.89/306,856.43
  6. Step 6: Final answer
    x = 235,829.28

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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.