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Finding the Fourth Proportional to 808.34, 1,115.57 and 454.33

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Solution

The fourth proportional to 808.34, 1,115.57 and 454.33 is: 627.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.34 : 1,115.57 = 454.33 : x
  2. Step 2: Convert to fraction form
    808.34/1,115.57 = 454.33/x
  3. Step 3: Cross multiply
    808.34x = 1,115.57 × 454.33
  4. Step 4: Simplify right side
    808.34x = 506,831.86
  5. Step 5: Solve for x
    x = 506,831.86/808.34
  6. Step 6: Final answer
    x = 627.01

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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.