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Finding the Fourth Proportional to 803.46, 1,109.56 and 555.42

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Solution

The fourth proportional to 803.46, 1,109.56 and 555.42 is: 767.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.46 : 1,109.56 = 555.42 : x
  2. Step 2: Convert to fraction form
    803.46/1,109.56 = 555.42/x
  3. Step 3: Cross multiply
    803.46x = 1,109.56 × 555.42
  4. Step 4: Simplify right side
    803.46x = 616,271.82
  5. Step 5: Solve for x
    x = 616,271.82/803.46
  6. Step 6: Final answer
    x = 767.02

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1.5x scale

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.