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Finding the Fourth Proportional to 666,290.43, 919,478.03 and 360,367.16

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Solution

The fourth proportional to 666,290.43, 919,478.03 and 360,367.16 is: 497,305.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,290.43 : 919,478.03 = 360,367.16 : x
  2. Step 2: Convert to fraction form
    666,290.43/919,478.03 = 360,367.16/x
  3. Step 3: Cross multiply
    666,290.43x = 919,478.03 × 360,367.16
  4. Step 4: Simplify right side
    666,290.43x = 331,349,679,954.27
  5. Step 5: Solve for x
    x = 331,349,679,954.27/666,290.43
  6. Step 6: Final answer
    x = 497,305.18

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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.