Home / 2,931.81-4,045.94-1,605.64

Finding the Fourth Proportional to 2,931.81, 4,045.94 and 1,605.64

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Solution

The fourth proportional to 2,931.81, 4,045.94 and 1,605.64 is: 2,215.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.81 : 4,045.94 = 1,605.64 : x
  2. Step 2: Convert to fraction form
    2,931.81/4,045.94 = 1,605.64/x
  3. Step 3: Cross multiply
    2,931.81x = 4,045.94 × 1,605.64
  4. Step 4: Simplify right side
    2,931.81x = 6,496,323.10
  5. Step 5: Solve for x
    x = 6,496,323.10/2,931.81
  6. Step 6: Final answer
    x = 2,215.81

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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.