Home / 2,931.51-4,045.47-1,605.21

Finding the Fourth Proportional to 2,931.51, 4,045.47 and 1,605.21

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Solution

The fourth proportional to 2,931.51, 4,045.47 and 1,605.21 is: 2,215.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.51 : 4,045.47 = 1,605.21 : x
  2. Step 2: Convert to fraction form
    2,931.51/4,045.47 = 1,605.21/x
  3. Step 3: Cross multiply
    2,931.51x = 4,045.47 × 1,605.21
  4. Step 4: Simplify right side
    2,931.51x = 6,493,828.90
  5. Step 5: Solve for x
    x = 6,493,828.90/2,931.51
  6. Step 6: Final answer
    x = 2,215.18

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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.