Home / 712,305.35-982,981.26-390,015.39

Finding the Fourth Proportional to 712,305.35, 982,981.26 and 390,015.39

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Solution

The fourth proportional to 712,305.35, 982,981.26 and 390,015.39 is: 538,221.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,305.35 : 982,981.26 = 390,015.39 : x
  2. Step 2: Convert to fraction form
    712,305.35/982,981.26 = 390,015.39/x
  3. Step 3: Cross multiply
    712,305.35x = 982,981.26 × 390,015.39
  4. Step 4: Simplify right side
    712,305.35x = 383,377,819,481.59
  5. Step 5: Solve for x
    x = 383,377,819,481.59/712,305.35
  6. Step 6: Final answer
    x = 538,221.17

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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.