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Finding the Fourth Proportional to 941.85, 1,403.07 and 913.16

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Solution

The fourth proportional to 941.85, 1,403.07 and 913.16 is: 1,360.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.85 : 1,403.07 = 913.16 : x
  2. Step 2: Convert to fraction form
    941.85/1,403.07 = 913.16/x
  3. Step 3: Cross multiply
    941.85x = 1,403.07 × 913.16
  4. Step 4: Simplify right side
    941.85x = 1,281,227.48
  5. Step 5: Solve for x
    x = 1,281,227.48/941.85
  6. Step 6: Final answer
    x = 1,360.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.