Home / 5,228.48-7,215.31-2,870.77

Finding the Fourth Proportional to 5,228.48, 7,215.31 and 2,870.77

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Solution

The fourth proportional to 5,228.48, 7,215.31 and 2,870.77 is: 3,961.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,228.48 : 7,215.31 = 2,870.77 : x
  2. Step 2: Convert to fraction form
    5,228.48/7,215.31 = 2,870.77/x
  3. Step 3: Cross multiply
    5,228.48x = 7,215.31 × 2,870.77
  4. Step 4: Simplify right side
    5,228.48x = 20,713,486.47
  5. Step 5: Solve for x
    x = 20,713,486.47/5,228.48
  6. Step 6: Final answer
    x = 3,961.67

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Half scale
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Double scale
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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.