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Finding the Fourth Proportional to 751.12, 1,036.32 and 471.40

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Solution

The fourth proportional to 751.12, 1,036.32 and 471.40 is: 650.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.12 : 1,036.32 = 471.40 : x
  2. Step 2: Convert to fraction form
    751.12/1,036.32 = 471.40/x
  3. Step 3: Cross multiply
    751.12x = 1,036.32 × 471.40
  4. Step 4: Simplify right side
    751.12x = 488,521.25
  5. Step 5: Solve for x
    x = 488,521.25/751.12
  6. Step 6: Final answer
    x = 650.39

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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.