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Finding the Fourth Proportional to 486,662.95, 671,574.54 and 279,915.62

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Solution

The fourth proportional to 486,662.95, 671,574.54 and 279,915.62 is: 386,271.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,662.95 : 671,574.54 = 279,915.62 : x
  2. Step 2: Convert to fraction form
    486,662.95/671,574.54 = 279,915.62/x
  3. Step 3: Cross multiply
    486,662.95x = 671,574.54 × 279,915.62
  4. Step 4: Simplify right side
    486,662.95x = 187,984,201,432.13
  5. Step 5: Solve for x
    x = 187,984,201,432.13/486,662.95
  6. Step 6: Final answer
    x = 386,271.86

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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.