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Finding the Fourth Proportional to 790.43, 1,090.87 and 541.55

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Solution

The fourth proportional to 790.43, 1,090.87 and 541.55 is: 747.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.43 : 1,090.87 = 541.55 : x
  2. Step 2: Convert to fraction form
    790.43/1,090.87 = 541.55/x
  3. Step 3: Cross multiply
    790.43x = 1,090.87 × 541.55
  4. Step 4: Simplify right side
    790.43x = 590,762.02
  5. Step 5: Solve for x
    x = 590,762.02/790.43
  6. Step 6: Final answer
    x = 747.40

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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.