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Finding the Fourth Proportional to 1,199.30, 1,655.08 and 675.20

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Solution

The fourth proportional to 1,199.30, 1,655.08 and 675.20 is: 931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.30 : 1,655.08 = 675.20 : x
  2. Step 2: Convert to fraction form
    1,199.30/1,655.08 = 675.20/x
  3. Step 3: Cross multiply
    1,199.30x = 1,655.08 × 675.20
  4. Step 4: Simplify right side
    1,199.30x = 1,117,510.02
  5. Step 5: Solve for x
    x = 1,117,510.02/1,199.30
  6. Step 6: Final answer
    x = 931.80

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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.