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Finding the Fourth Proportional to 620,635.40, 930,953.10 and 305,707.40

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Solution

The fourth proportional to 620,635.40, 930,953.10 and 305,707.40 is: 458,561.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,635.40 : 930,953.10 = 305,707.40 : x
  2. Step 2: Convert to fraction form
    620,635.40/930,953.10 = 305,707.40/x
  3. Step 3: Cross multiply
    620,635.40x = 930,953.10 × 305,707.40
  4. Step 4: Simplify right side
    620,635.40x = 284,599,251,722.94
  5. Step 5: Solve for x
    x = 284,599,251,722.94/620,635.40
  6. Step 6: Final answer
    x = 458,561.10

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Similar ratio
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1.5x scale

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.