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Finding the Fourth Proportional to 921,783.28, 1,374,833 and 905,832.88

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Solution

The fourth proportional to 921,783.28, 1,374,833 and 905,832.88 is: 1,351,043.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,783.28 : 1,374,833 = 905,832.88 : x
  2. Step 2: Convert to fraction form
    921,783.28/1,374,833 = 905,832.88/x
  3. Step 3: Cross multiply
    921,783.28x = 1,374,833 × 905,832.88
  4. Step 4: Simplify right side
    921,783.28x = 1,245,368,935,909.04
  5. Step 5: Solve for x
    x = 1,245,368,935,909.04/921,783.28
  6. Step 6: Final answer
    x = 1,351,043.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.