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Finding the Fourth Proportional to 860.99, 1,188.22 and 482.91

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Solution

The fourth proportional to 860.99, 1,188.22 and 482.91 is: 666.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.99 : 1,188.22 = 482.91 : x
  2. Step 2: Convert to fraction form
    860.99/1,188.22 = 482.91/x
  3. Step 3: Cross multiply
    860.99x = 1,188.22 × 482.91
  4. Step 4: Simplify right side
    860.99x = 573,803.32
  5. Step 5: Solve for x
    x = 573,803.32/860.99
  6. Step 6: Final answer
    x = 666.45

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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.