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Finding the Fourth Proportional to 1,609.94, 2,415.38 and 788.46

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Solution

The fourth proportional to 1,609.94, 2,415.38 and 788.46 is: 1,182.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.94 : 2,415.38 = 788.46 : x
  2. Step 2: Convert to fraction form
    1,609.94/2,415.38 = 788.46/x
  3. Step 3: Cross multiply
    1,609.94x = 2,415.38 × 788.46
  4. Step 4: Simplify right side
    1,609.94x = 1,904,417.51
  5. Step 5: Solve for x
    x = 1,904,417.51/1,609.94
  6. Step 6: Final answer
    x = 1,182.91

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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.