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Finding the Fourth Proportional to 2,875.91, 4,313.86 and 928.11

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Solution

The fourth proportional to 2,875.91, 4,313.86 and 928.11 is: 1,392.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,875.91 : 4,313.86 = 928.11 : x
  2. Step 2: Convert to fraction form
    2,875.91/4,313.86 = 928.11/x
  3. Step 3: Cross multiply
    2,875.91x = 4,313.86 × 928.11
  4. Step 4: Simplify right side
    2,875.91x = 4,003,734.28
  5. Step 5: Solve for x
    x = 4,003,734.28/2,875.91
  6. Step 6: Final answer
    x = 1,392.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.