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Finding the Fourth Proportional to 973.98, 1,461.15 and 609.21

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Solution

The fourth proportional to 973.98, 1,461.15 and 609.21 is: 913.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.98 : 1,461.15 = 609.21 : x
  2. Step 2: Convert to fraction form
    973.98/1,461.15 = 609.21/x
  3. Step 3: Cross multiply
    973.98x = 1,461.15 × 609.21
  4. Step 4: Simplify right side
    973.98x = 890,147.19
  5. Step 5: Solve for x
    x = 890,147.19/973.98
  6. Step 6: Final answer
    x = 913.93

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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.