Home / 716,748.40-989,112.96-394,458.40

Finding the Fourth Proportional to 716,748.40, 989,112.96 and 394,458.40

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Solution

The fourth proportional to 716,748.40, 989,112.96 and 394,458.40 is: 544,352.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,748.40 : 989,112.96 = 394,458.40 : x
  2. Step 2: Convert to fraction form
    716,748.40/989,112.96 = 394,458.40/x
  3. Step 3: Cross multiply
    716,748.40x = 989,112.96 × 394,458.40
  4. Step 4: Simplify right side
    716,748.40x = 390,163,915,620.86
  5. Step 5: Solve for x
    x = 390,163,915,620.86/716,748.40
  6. Step 6: Final answer
    x = 544,352.68

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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.