Home / 1,490.30-2,056.40-827.16

Finding the Fourth Proportional to 1,490.30, 2,056.40 and 827.16

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Solution

The fourth proportional to 1,490.30, 2,056.40 and 827.16 is: 1,141.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.30 : 2,056.40 = 827.16 : x
  2. Step 2: Convert to fraction form
    1,490.30/2,056.40 = 827.16/x
  3. Step 3: Cross multiply
    1,490.30x = 2,056.40 × 827.16
  4. Step 4: Simplify right side
    1,490.30x = 1,700,970.79
  5. Step 5: Solve for x
    x = 1,700,970.79/1,490.30
  6. Step 6: Final answer
    x = 1,141.36

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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.