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Finding the Fourth Proportional to 1,287,663.27, 1,927,737.45 and 964,882.20

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Solution

The fourth proportional to 1,287,663.27, 1,927,737.45 and 964,882.20 is: 1,444,507.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,663.27 : 1,927,737.45 = 964,882.20 : x
  2. Step 2: Convert to fraction form
    1,287,663.27/1,927,737.45 = 964,882.20/x
  3. Step 3: Cross multiply
    1,287,663.27x = 1,927,737.45 × 964,882.20
  4. Step 4: Simplify right side
    1,287,663.27x = 1,860,039,551,778.39
  5. Step 5: Solve for x
    x = 1,860,039,551,778.39/1,287,663.27
  6. Step 6: Final answer
    x = 1,444,507.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.