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Finding the Fourth Proportional to 2,907.92, 4,011.62 and 1,788.76

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Solution

The fourth proportional to 2,907.92, 4,011.62 and 1,788.76 is: 2,467.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.92 : 4,011.62 = 1,788.76 : x
  2. Step 2: Convert to fraction form
    2,907.92/4,011.62 = 1,788.76/x
  3. Step 3: Cross multiply
    2,907.92x = 4,011.62 × 1,788.76
  4. Step 4: Simplify right side
    2,907.92x = 7,175,825.39
  5. Step 5: Solve for x
    x = 7,175,825.39/2,907.92
  6. Step 6: Final answer
    x = 2,467.68

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Find fourth proportional to 1,453.96, 2,005.81 and 894.38
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.