Home / 1,213.49-1,815.60-1,210.40

Finding the Fourth Proportional to 1,213.49, 1,815.60 and 1,210.40

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Solution

The fourth proportional to 1,213.49, 1,815.60 and 1,210.40 is: 1,810.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.49 : 1,815.60 = 1,210.40 : x
  2. Step 2: Convert to fraction form
    1,213.49/1,815.60 = 1,210.40/x
  3. Step 3: Cross multiply
    1,213.49x = 1,815.60 × 1,210.40
  4. Step 4: Simplify right side
    1,213.49x = 2,197,602.24
  5. Step 5: Solve for x
    x = 2,197,602.24/1,213.49
  6. Step 6: Final answer
    x = 1,810.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.