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Finding the Fourth Proportional to 666,362.70, 919,577.10 and 360,438.15

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Solution

The fourth proportional to 666,362.70, 919,577.10 and 360,438.15 is: 497,402.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,362.70 : 919,577.10 = 360,438.15 : x
  2. Step 2: Convert to fraction form
    666,362.70/919,577.10 = 360,438.15/x
  3. Step 3: Cross multiply
    666,362.70x = 919,577.10 × 360,438.15
  4. Step 4: Simplify right side
    666,362.70x = 331,450,673,506.42
  5. Step 5: Solve for x
    x = 331,450,673,506.42/666,362.70
  6. Step 6: Final answer
    x = 497,402.80

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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.