Home / 1,457.98-2,011.38-985.71

Finding the Fourth Proportional to 1,457.98, 2,011.38 and 985.71

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Solution

The fourth proportional to 1,457.98, 2,011.38 and 985.71 is: 1,359.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,457.98 : 2,011.38 = 985.71 : x
  2. Step 2: Convert to fraction form
    1,457.98/2,011.38 = 985.71/x
  3. Step 3: Cross multiply
    1,457.98x = 2,011.38 × 985.71
  4. Step 4: Simplify right side
    1,457.98x = 1,982,637.38
  5. Step 5: Solve for x
    x = 1,982,637.38/1,457.98
  6. Step 6: Final answer
    x = 1,359.85

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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.