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Finding the Fourth Proportional to 1,071.42, 1,477.95 and 672.93

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Solution

The fourth proportional to 1,071.42, 1,477.95 and 672.93 is: 928.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.42 : 1,477.95 = 672.93 : x
  2. Step 2: Convert to fraction form
    1,071.42/1,477.95 = 672.93/x
  3. Step 3: Cross multiply
    1,071.42x = 1,477.95 × 672.93
  4. Step 4: Simplify right side
    1,071.42x = 994,556.89
  5. Step 5: Solve for x
    x = 994,556.89/1,071.42
  6. Step 6: Final answer
    x = 928.26

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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.