Home / 1,681.45-2,520.09-1,312.39

Finding the Fourth Proportional to 1,681.45, 2,520.09 and 1,312.39

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Solution

The fourth proportional to 1,681.45, 2,520.09 and 1,312.39 is: 1,966.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.45 : 2,520.09 = 1,312.39 : x
  2. Step 2: Convert to fraction form
    1,681.45/2,520.09 = 1,312.39/x
  3. Step 3: Cross multiply
    1,681.45x = 2,520.09 × 1,312.39
  4. Step 4: Simplify right side
    1,681.45x = 3,307,340.92
  5. Step 5: Solve for x
    x = 3,307,340.92/1,681.45
  6. Step 6: Final answer
    x = 1,966.96

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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.