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Finding the Fourth Proportional to 666,862.98, 920,270.85 and 360,939.32

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Solution

The fourth proportional to 666,862.98, 920,270.85 and 360,939.32 is: 498,096.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,862.98 : 920,270.85 = 360,939.32 : x
  2. Step 2: Convert to fraction form
    666,862.98/920,270.85 = 360,939.32/x
  3. Step 3: Cross multiply
    666,862.98x = 920,270.85 × 360,939.32
  4. Step 4: Simplify right side
    666,862.98x = 332,161,928,859.95
  5. Step 5: Solve for x
    x = 332,161,928,859.95/666,862.98
  6. Step 6: Final answer
    x = 498,096.22

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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.