Home / 507,142.20-699,878.10-280,787.70

Finding the Fourth Proportional to 507,142.20, 699,878.10 and 280,787.70

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Solution

The fourth proportional to 507,142.20, 699,878.10 and 280,787.70 is: 387,499.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,142.20 : 699,878.10 = 280,787.70 : x
  2. Step 2: Convert to fraction form
    507,142.20/699,878.10 = 280,787.70/x
  3. Step 3: Cross multiply
    507,142.20x = 699,878.10 × 280,787.70
  4. Step 4: Simplify right side
    507,142.20x = 196,517,161,979.37
  5. Step 5: Solve for x
    x = 196,517,161,979.37/507,142.20
  6. Step 6: Final answer
    x = 387,499.13

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1.5x scale

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.