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Finding the Fourth Proportional to 942.98, 1,412.30 and 558.50

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Solution

The fourth proportional to 942.98, 1,412.30 and 558.50 is: 836.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.98 : 1,412.30 = 558.50 : x
  2. Step 2: Convert to fraction form
    942.98/1,412.30 = 558.50/x
  3. Step 3: Cross multiply
    942.98x = 1,412.30 × 558.50
  4. Step 4: Simplify right side
    942.98x = 788,763.88
  5. Step 5: Solve for x
    x = 788,763.88/942.98
  6. Step 6: Final answer
    x = 836.46

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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.