Home / 2,931.69-4,045.73-1,605.39

Finding the Fourth Proportional to 2,931.69, 4,045.73 and 1,605.39

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Solution

The fourth proportional to 2,931.69, 4,045.73 and 1,605.39 is: 2,215.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.69 : 4,045.73 = 1,605.39 : x
  2. Step 2: Convert to fraction form
    2,931.69/4,045.73 = 1,605.39/x
  3. Step 3: Cross multiply
    2,931.69x = 4,045.73 × 1,605.39
  4. Step 4: Simplify right side
    2,931.69x = 6,494,946.23
  5. Step 5: Solve for x
    x = 6,494,946.23/2,931.69
  6. Step 6: Final answer
    x = 2,215.43

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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.