Home / 712,299.39-982,972.94-390,009.39

Finding the Fourth Proportional to 712,299.39, 982,972.94 and 390,009.39

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Solution

The fourth proportional to 712,299.39, 982,972.94 and 390,009.39 is: 538,212.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,299.39 : 982,972.94 = 390,009.39 : x
  2. Step 2: Convert to fraction form
    712,299.39/982,972.94 = 390,009.39/x
  3. Step 3: Cross multiply
    712,299.39x = 982,972.94 × 390,009.39
  4. Step 4: Simplify right side
    712,299.39x = 383,368,674,765.86
  5. Step 5: Solve for x
    x = 383,368,674,765.86/712,299.39
  6. Step 6: Final answer
    x = 538,212.84

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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.