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Finding the Fourth Proportional to 486,662.57, 671,574.02 and 279,915.23

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Solution

The fourth proportional to 486,662.57, 671,574.02 and 279,915.23 is: 386,271.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,662.57 : 671,574.02 = 279,915.23 : x
  2. Step 2: Convert to fraction form
    486,662.57/671,574.02 = 279,915.23/x
  3. Step 3: Cross multiply
    486,662.57x = 671,574.02 × 279,915.23
  4. Step 4: Simplify right side
    486,662.57x = 187,983,791,512.88
  5. Step 5: Solve for x
    x = 187,983,791,512.88/486,662.57
  6. Step 6: Final answer
    x = 386,271.32

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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.