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Finding the Fourth Proportional to 1,193.85, 1,646.18 and 977.59

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Solution

The fourth proportional to 1,193.85, 1,646.18 and 977.59 is: 1,347.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.85 : 1,646.18 = 977.59 : x
  2. Step 2: Convert to fraction form
    1,193.85/1,646.18 = 977.59/x
  3. Step 3: Cross multiply
    1,193.85x = 1,646.18 × 977.59
  4. Step 4: Simplify right side
    1,193.85x = 1,609,280.10
  5. Step 5: Solve for x
    x = 1,609,280.10/1,193.85
  6. Step 6: Final answer
    x = 1,347.98

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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.