Home / 2,988.65-4,123.71-1,809.50

Finding the Fourth Proportional to 2,988.65, 4,123.71 and 1,809.50

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Solution

The fourth proportional to 2,988.65, 4,123.71 and 1,809.50 is: 2,496.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.65 : 4,123.71 = 1,809.50 : x
  2. Step 2: Convert to fraction form
    2,988.65/4,123.71 = 1,809.50/x
  3. Step 3: Cross multiply
    2,988.65x = 4,123.71 × 1,809.50
  4. Step 4: Simplify right side
    2,988.65x = 7,461,832.63
  5. Step 5: Solve for x
    x = 7,461,832.63/2,988.65
  6. Step 6: Final answer
    x = 2,496.73

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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.