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Finding the Fourth Proportional to 741.79, 1,024.08 and 493.45

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Solution

The fourth proportional to 741.79, 1,024.08 and 493.45 is: 681.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.79 : 1,024.08 = 493.45 : x
  2. Step 2: Convert to fraction form
    741.79/1,024.08 = 493.45/x
  3. Step 3: Cross multiply
    741.79x = 1,024.08 × 493.45
  4. Step 4: Simplify right side
    741.79x = 505,332.28
  5. Step 5: Solve for x
    x = 505,332.28/741.79
  6. Step 6: Final answer
    x = 681.23

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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.