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Finding the Fourth Proportional to 279,988.60, 419,982.90 and 185,510.20

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Solution

The fourth proportional to 279,988.60, 419,982.90 and 185,510.20 is: 278,265.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,988.60 : 419,982.90 = 185,510.20 : x
  2. Step 2: Convert to fraction form
    279,988.60/419,982.90 = 185,510.20/x
  3. Step 3: Cross multiply
    279,988.60x = 419,982.90 × 185,510.20
  4. Step 4: Simplify right side
    279,988.60x = 77,911,111,775.58
  5. Step 5: Solve for x
    x = 77,911,111,775.58/279,988.60
  6. Step 6: Final answer
    x = 278,265.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.