Home / 2,490.74-3,437.18-1,428.70

Finding the Fourth Proportional to 2,490.74, 3,437.18 and 1,428.70

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Solution

The fourth proportional to 2,490.74, 3,437.18 and 1,428.70 is: 1,971.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.74 : 3,437.18 = 1,428.70 : x
  2. Step 2: Convert to fraction form
    2,490.74/3,437.18 = 1,428.70/x
  3. Step 3: Cross multiply
    2,490.74x = 3,437.18 × 1,428.70
  4. Step 4: Simplify right side
    2,490.74x = 4,910,681.88
  5. Step 5: Solve for x
    x = 4,910,681.88/2,490.74
  6. Step 6: Final answer
    x = 1,971.58

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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.