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Finding the Fourth Proportional to 666,862.88, 920,270.70 and 360,939.21

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Solution

The fourth proportional to 666,862.88, 920,270.70 and 360,939.21 is: 498,096.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,862.88 : 920,270.70 = 360,939.21 : x
  2. Step 2: Convert to fraction form
    666,862.88/920,270.70 = 360,939.21/x
  3. Step 3: Cross multiply
    666,862.88x = 920,270.70 × 360,939.21
  4. Step 4: Simplify right side
    666,862.88x = 332,161,774,842.79
  5. Step 5: Solve for x
    x = 332,161,774,842.79/666,862.88
  6. Step 6: Final answer
    x = 498,096.07

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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.