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Finding the Fourth Proportional to 712,168.32, 982,815.48 and 389,878.32

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Solution

The fourth proportional to 712,168.32, 982,815.48 and 389,878.32 is: 538,044.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,168.32 : 982,815.48 = 389,878.32 : x
  2. Step 2: Convert to fraction form
    712,168.32/982,815.48 = 389,878.32/x
  3. Step 3: Cross multiply
    712,168.32x = 982,815.48 × 389,878.32
  4. Step 4: Simplify right side
    712,168.32x = 383,178,448,212.39
  5. Step 5: Solve for x
    x = 383,178,448,212.39/712,168.32
  6. Step 6: Final answer
    x = 538,044.78

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Double scale
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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.