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Finding the Fourth Proportional to 1,608.51, 2,411.95 and 785.55

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Solution

The fourth proportional to 1,608.51, 2,411.95 and 785.55 is: 1,177.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.51 : 2,411.95 = 785.55 : x
  2. Step 2: Convert to fraction form
    1,608.51/2,411.95 = 785.55/x
  3. Step 3: Cross multiply
    1,608.51x = 2,411.95 × 785.55
  4. Step 4: Simplify right side
    1,608.51x = 1,894,707.32
  5. Step 5: Solve for x
    x = 1,894,707.32/1,608.51
  6. Step 6: Final answer
    x = 1,177.93

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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.