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Finding the Fourth Proportional to 389,910, 537,770.04 and 253,986.76

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Solution

The fourth proportional to 389,910, 537,770.04 and 253,986.76 is: 350,302.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,910 : 537,770.04 = 253,986.76 : x
  2. Step 2: Convert to fraction form
    389,910/537,770.04 = 253,986.76/x
  3. Step 3: Cross multiply
    389,910x = 537,770.04 × 253,986.76
  4. Step 4: Simplify right side
    389,910x = 136,586,470,084.67
  5. Step 5: Solve for x
    x = 136,586,470,084.67/389,910
  6. Step 6: Final answer
    x = 350,302.56

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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.