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Finding the Fourth Proportional to 1,027.47, 1,417.91 and 561.72

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Solution

The fourth proportional to 1,027.47, 1,417.91 and 561.72 is: 775.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.47 : 1,417.91 = 561.72 : x
  2. Step 2: Convert to fraction form
    1,027.47/1,417.91 = 561.72/x
  3. Step 3: Cross multiply
    1,027.47x = 1,417.91 × 561.72
  4. Step 4: Simplify right side
    1,027.47x = 796,468.41
  5. Step 5: Solve for x
    x = 796,468.41/1,027.47
  6. Step 6: Final answer
    x = 775.17

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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.