Home / 2,870.51-3,960.77-1,691.28

Finding the Fourth Proportional to 2,870.51, 3,960.77 and 1,691.28

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Solution

The fourth proportional to 2,870.51, 3,960.77 and 1,691.28 is: 2,333.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,870.51 : 3,960.77 = 1,691.28 : x
  2. Step 2: Convert to fraction form
    2,870.51/3,960.77 = 1,691.28/x
  3. Step 3: Cross multiply
    2,870.51x = 3,960.77 × 1,691.28
  4. Step 4: Simplify right side
    2,870.51x = 6,698,762.63
  5. Step 5: Solve for x
    x = 6,698,762.63/2,870.51
  6. Step 6: Final answer
    x = 2,333.65

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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.