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Finding the Fourth Proportional to 837.64, 1,156.80 and 707.68

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Solution

The fourth proportional to 837.64, 1,156.80 and 707.68 is: 977.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.64 : 1,156.80 = 707.68 : x
  2. Step 2: Convert to fraction form
    837.64/1,156.80 = 707.68/x
  3. Step 3: Cross multiply
    837.64x = 1,156.80 × 707.68
  4. Step 4: Simplify right side
    837.64x = 818,644.22
  5. Step 5: Solve for x
    x = 818,644.22/837.64
  6. Step 6: Final answer
    x = 977.32

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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.