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Finding the Fourth Proportional to 973.74, 1,344.18 and 624.36

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Solution

The fourth proportional to 973.74, 1,344.18 and 624.36 is: 861.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.74 : 1,344.18 = 624.36 : x
  2. Step 2: Convert to fraction form
    973.74/1,344.18 = 624.36/x
  3. Step 3: Cross multiply
    973.74x = 1,344.18 × 624.36
  4. Step 4: Simplify right side
    973.74x = 839,252.22
  5. Step 5: Solve for x
    x = 839,252.22/973.74
  6. Step 6: Final answer
    x = 861.89

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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.