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Finding the Fourth Proportional to 667,330.08, 921,004.20 and 380,784.48

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Solution

The fourth proportional to 667,330.08, 921,004.20 and 380,784.48 is: 525,533.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,330.08 : 921,004.20 = 380,784.48 : x
  2. Step 2: Convert to fraction form
    667,330.08/921,004.20 = 380,784.48/x
  3. Step 3: Cross multiply
    667,330.08x = 921,004.20 × 380,784.48
  4. Step 4: Simplify right side
    667,330.08x = 350,704,105,374.82
  5. Step 5: Solve for x
    x = 350,704,105,374.82/667,330.08
  6. Step 6: Final answer
    x = 525,533.19

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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.