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Finding the Fourth Proportional to 1,247,688.50, 1,721,978.61 and 703,935.86

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Solution

The fourth proportional to 1,247,688.50, 1,721,978.61 and 703,935.86 is: 971,526.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,688.50 : 1,721,978.61 = 703,935.86 : x
  2. Step 2: Convert to fraction form
    1,247,688.50/1,721,978.61 = 703,935.86/x
  3. Step 3: Cross multiply
    1,247,688.50x = 1,721,978.61 × 703,935.86
  4. Step 4: Simplify right side
    1,247,688.50x = 1,212,162,493,731.95
  5. Step 5: Solve for x
    x = 1,212,162,493,731.95/1,247,688.50
  6. Step 6: Final answer
    x = 971,526.54

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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.