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Finding the Fourth Proportional to 666,747.96, 920,243.34 and 505,321.44

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Solution

The fourth proportional to 666,747.96, 920,243.34 and 505,321.44 is: 697,442.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,747.96 : 920,243.34 = 505,321.44 : x
  2. Step 2: Convert to fraction form
    666,747.96/920,243.34 = 505,321.44/x
  3. Step 3: Cross multiply
    666,747.96x = 920,243.34 × 505,321.44
  4. Step 4: Simplify right side
    666,747.96x = 465,018,689,719.21
  5. Step 5: Solve for x
    x = 465,018,689,719.21/666,747.96
  6. Step 6: Final answer
    x = 697,442.99

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1.5x scale

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.