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Finding the Fourth Proportional to 624.51, 860.57 and 557.99

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Solution

The fourth proportional to 624.51, 860.57 and 557.99 is: 768.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.51 : 860.57 = 557.99 : x
  2. Step 2: Convert to fraction form
    624.51/860.57 = 557.99/x
  3. Step 3: Cross multiply
    624.51x = 860.57 × 557.99
  4. Step 4: Simplify right side
    624.51x = 480,190.82
  5. Step 5: Solve for x
    x = 480,190.82/624.51
  6. Step 6: Final answer
    x = 768.91

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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.