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Finding the Fourth Proportional to 751.77, 1,126.08 and 477.72

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Solution

The fourth proportional to 751.77, 1,126.08 and 477.72 is: 715.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.77 : 1,126.08 = 477.72 : x
  2. Step 2: Convert to fraction form
    751.77/1,126.08 = 477.72/x
  3. Step 3: Cross multiply
    751.77x = 1,126.08 × 477.72
  4. Step 4: Simplify right side
    751.77x = 537,950.94
  5. Step 5: Solve for x
    x = 537,950.94/751.77
  6. Step 6: Final answer
    x = 715.58

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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.