Home / 667,399.20-921,025.76-380,913.52

Finding the Fourth Proportional to 667,399.20, 921,025.76 and 380,913.52

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Solution

The fourth proportional to 667,399.20, 921,025.76 and 380,913.52 is: 525,669.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,399.20 : 921,025.76 = 380,913.52 : x
  2. Step 2: Convert to fraction form
    667,399.20/921,025.76 = 380,913.52/x
  3. Step 3: Cross multiply
    667,399.20x = 921,025.76 × 380,913.52
  4. Step 4: Simplify right side
    667,399.20x = 350,831,164,252.28
  5. Step 5: Solve for x
    x = 350,831,164,252.28/667,399.20
  6. Step 6: Final answer
    x = 525,669.14

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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.