Home / 2,931.39-4,045.32-1,605.11

Finding the Fourth Proportional to 2,931.39, 4,045.32 and 1,605.11

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Solution

The fourth proportional to 2,931.39, 4,045.32 and 1,605.11 is: 2,215.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.39 : 4,045.32 = 1,605.11 : x
  2. Step 2: Convert to fraction form
    2,931.39/4,045.32 = 1,605.11/x
  3. Step 3: Cross multiply
    2,931.39x = 4,045.32 × 1,605.11
  4. Step 4: Simplify right side
    2,931.39x = 6,493,163.36
  5. Step 5: Solve for x
    x = 6,493,163.36/2,931.39
  6. Step 6: Final answer
    x = 2,215.05

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1.5x scale

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.