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Finding the Fourth Proportional to 2,970.39, 4,455.93 and 890.51

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Solution

The fourth proportional to 2,970.39, 4,455.93 and 890.51 is: 1,335.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,970.39 : 4,455.93 = 890.51 : x
  2. Step 2: Convert to fraction form
    2,970.39/4,455.93 = 890.51/x
  3. Step 3: Cross multiply
    2,970.39x = 4,455.93 × 890.51
  4. Step 4: Simplify right side
    2,970.39x = 3,968,027.94
  5. Step 5: Solve for x
    x = 3,968,027.94/2,970.39
  6. Step 6: Final answer
    x = 1,335.86

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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.