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Finding the Fourth Proportional to 1,147,861.56, 1,583,621.10 and 717,978.36

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Solution

The fourth proportional to 1,147,861.56, 1,583,621.10 and 717,978.36 is: 990,542.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147,861.56 : 1,583,621.10 = 717,978.36 : x
  2. Step 2: Convert to fraction form
    1,147,861.56/1,583,621.10 = 717,978.36/x
  3. Step 3: Cross multiply
    1,147,861.56x = 1,583,621.10 × 717,978.36
  4. Step 4: Simplify right side
    1,147,861.56x = 1,137,005,680,239.40
  5. Step 5: Solve for x
    x = 1,137,005,680,239.40/1,147,861.56
  6. Step 6: Final answer
    x = 990,542.52

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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.