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Finding the Fourth Proportional to 973.61, 1,344.48 and 624.90

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Solution

The fourth proportional to 973.61, 1,344.48 and 624.90 is: 862.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.61 : 1,344.48 = 624.90 : x
  2. Step 2: Convert to fraction form
    973.61/1,344.48 = 624.90/x
  3. Step 3: Cross multiply
    973.61x = 1,344.48 × 624.90
  4. Step 4: Simplify right side
    973.61x = 840,165.55
  5. Step 5: Solve for x
    x = 840,165.55/973.61
  6. Step 6: Final answer
    x = 862.94

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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.