Home / 840,432.40-1,260,821.40-279,869.20

Finding the Fourth Proportional to 840,432.40, 1,260,821.40 and 279,869.20

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Solution

The fourth proportional to 840,432.40, 1,260,821.40 and 279,869.20 is: 419,861.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,432.40 : 1,260,821.40 = 279,869.20 : x
  2. Step 2: Convert to fraction form
    840,432.40/1,260,821.40 = 279,869.20/x
  3. Step 3: Cross multiply
    840,432.40x = 1,260,821.40 × 279,869.20
  4. Step 4: Simplify right side
    840,432.40x = 352,865,076,560.88
  5. Step 5: Solve for x
    x = 352,865,076,560.88/840,432.40
  6. Step 6: Final answer
    x = 419,861.34

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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.