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Finding the Fourth Proportional to 640,270.15, 883,756.85 and 422,637.67

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Solution

The fourth proportional to 640,270.15, 883,756.85 and 422,637.67 is: 583,361.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,270.15 : 883,756.85 = 422,637.67 : x
  2. Step 2: Convert to fraction form
    640,270.15/883,756.85 = 422,637.67/x
  3. Step 3: Cross multiply
    640,270.15x = 883,756.85 × 422,637.67
  4. Step 4: Simplify right side
    640,270.15x = 373,508,935,930.54
  5. Step 5: Solve for x
    x = 373,508,935,930.54/640,270.15
  6. Step 6: Final answer
    x = 583,361.47

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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.