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Finding the Fourth Proportional to 620,637.10, 930,955.65 and 408,060.70

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Solution

The fourth proportional to 620,637.10, 930,955.65 and 408,060.70 is: 612,091.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,637.10 : 930,955.65 = 408,060.70 : x
  2. Step 2: Convert to fraction form
    620,637.10/930,955.65 = 408,060.70/x
  3. Step 3: Cross multiply
    620,637.10x = 930,955.65 × 408,060.70
  4. Step 4: Simplify right side
    620,637.10x = 379,886,414,207.96
  5. Step 5: Solve for x
    x = 379,886,414,207.96/620,637.10
  6. Step 6: Final answer
    x = 612,091.05

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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.