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Finding the Fourth Proportional to 618,865.84, 928,415.40 and 440,931.52

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Solution

The fourth proportional to 618,865.84, 928,415.40 and 440,931.52 is: 661,480.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,865.84 : 928,415.40 = 440,931.52 : x
  2. Step 2: Convert to fraction form
    618,865.84/928,415.40 = 440,931.52/x
  3. Step 3: Cross multiply
    618,865.84x = 928,415.40 × 440,931.52
  4. Step 4: Simplify right side
    618,865.84x = 409,367,613,513.41
  5. Step 5: Solve for x
    x = 409,367,613,513.41/618,865.84
  6. Step 6: Final answer
    x = 661,480.38

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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.