Home / 1,528.50-2,108.37-1,218.74

Finding the Fourth Proportional to 1,528.50, 2,108.37 and 1,218.74

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Solution

The fourth proportional to 1,528.50, 2,108.37 and 1,218.74 is: 1,681.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.50 : 2,108.37 = 1,218.74 : x
  2. Step 2: Convert to fraction form
    1,528.50/2,108.37 = 1,218.74/x
  3. Step 3: Cross multiply
    1,528.50x = 2,108.37 × 1,218.74
  4. Step 4: Simplify right side
    1,528.50x = 2,569,554.85
  5. Step 5: Solve for x
    x = 2,569,554.85/1,528.50
  6. Step 6: Final answer
    x = 1,681.10

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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.