Home / 2,931.87-4,045.77-1,605.30

Finding the Fourth Proportional to 2,931.87, 4,045.77 and 1,605.30

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Solution

The fourth proportional to 2,931.87, 4,045.77 and 1,605.30 is: 2,215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.87 : 4,045.77 = 1,605.30 : x
  2. Step 2: Convert to fraction form
    2,931.87/4,045.77 = 1,605.30/x
  3. Step 3: Cross multiply
    2,931.87x = 4,045.77 × 1,605.30
  4. Step 4: Simplify right side
    2,931.87x = 6,494,674.58
  5. Step 5: Solve for x
    x = 6,494,674.58/2,931.87
  6. Step 6: Final answer
    x = 2,215.20

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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.