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Finding the Fourth Proportional to 1,051.86, 1,574.74 and 611.77

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Solution

The fourth proportional to 1,051.86, 1,574.74 and 611.77 is: 915.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.86 : 1,574.74 = 611.77 : x
  2. Step 2: Convert to fraction form
    1,051.86/1,574.74 = 611.77/x
  3. Step 3: Cross multiply
    1,051.86x = 1,574.74 × 611.77
  4. Step 4: Simplify right side
    1,051.86x = 963,375.63
  5. Step 5: Solve for x
    x = 963,375.63/1,051.86
  6. Step 6: Final answer
    x = 915.88

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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.