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Finding the Fourth Proportional to 973.14, 1,341.45 and 720.42

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Solution

The fourth proportional to 973.14, 1,341.45 and 720.42 is: 993.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.14 : 1,341.45 = 720.42 : x
  2. Step 2: Convert to fraction form
    973.14/1,341.45 = 720.42/x
  3. Step 3: Cross multiply
    973.14x = 1,341.45 × 720.42
  4. Step 4: Simplify right side
    973.14x = 966,407.41
  5. Step 5: Solve for x
    x = 966,407.41/973.14
  6. Step 6: Final answer
    x = 993.08

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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.