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Finding the Fourth Proportional to 692,883.09, 949,234.02 and 666,978.01

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Solution

The fourth proportional to 692,883.09, 949,234.02 and 666,978.01 is: 913,744.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,883.09 : 949,234.02 = 666,978.01 : x
  2. Step 2: Convert to fraction form
    692,883.09/949,234.02 = 666,978.01/x
  3. Step 3: Cross multiply
    692,883.09x = 949,234.02 × 666,978.01
  4. Step 4: Simplify right side
    692,883.09x = 633,118,217,683.90
  5. Step 5: Solve for x
    x = 633,118,217,683.90/692,883.09
  6. Step 6: Final answer
    x = 913,744.65

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.