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Finding the Fourth Proportional to 620,728.72, 931,074.41 and 171,476.46

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Solution

The fourth proportional to 620,728.72, 931,074.41 and 171,476.46 is: 257,209.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,728.72 : 931,074.41 = 171,476.46 : x
  2. Step 2: Convert to fraction form
    620,728.72/931,074.41 = 171,476.46/x
  3. Step 3: Cross multiply
    620,728.72x = 931,074.41 × 171,476.46
  4. Step 4: Simplify right side
    620,728.72x = 159,657,344,252.08
  5. Step 5: Solve for x
    x = 159,657,344,252.08/620,728.72
  6. Step 6: Final answer
    x = 257,209.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.